If you have ever asked a fabric supplier for a quotation, you have probably been asked two questions almost immediately: What GSM do you need, and what fabric width do you need?
For an experienced textile buyer, these may look like basic specifications. For a new blanket brand, garment manufacturer, toy factory or home-textile importer, however, they can be surprisingly difficult to answer. Should a winter blanket always use the highest GSM? Does a 300 GSM faux rabbit fur fabric feel the same as a 300 GSM flannel fleece? If the finished blanket is 150 cm wide, is a 150 cm fabric width enough?
The short answer is no. GSM is not a quality grade, and nominal fabric width is not necessarily the width you can actually cut. The right specification depends on the fabric construction, finished product, cutting layout, target weight, season, price level and packaging method.
At Kingcason, we manufacture and supply polyester pile fabrics for blankets, pajamas, apparel, cushions, toys, pet products and other textile applications. This guide explains how our factory evaluates GSM and fabric width before sampling and bulk production.
Quick Answer: How Should You Choose Fleece Fabric GSM and Width?
Choose the GSM according to the required weight, warmth, drape, pile structure and end use of the finished product. Choose the usable width according to the cutting layout, finished dimensions, seam allowance, edge finishing, shrinkage and pattern or pile direction.
Do not select either specification in isolation. A fabric can have the correct GSM but create excessive cutting waste because its width is unsuitable. It can also have the correct width but produce a blanket that is too heavy, too light or too expensive for the target market.
For the most reliable recommendation, provide your supplier with the finished size, product type, target unit weight, single- or double-layer construction, required surface feel, quantity and packaging method.
What Is GSM in Fleece Fabric?
GSM stands for grams per square meter. It measures how much one square meter of fabric weighs.
The formula is:
GSM = sample weight in grams ÷ sample area in square meters
For example, if a one-square-meter piece of fleece weighs 300 grams, its fabric weight is 300 GSM.
GSM is widely used in international textile sourcing because it allows buyers to compare fabric weight without being affected by roll length or width. It also helps factories calculate approximate material consumption, finished-product weight and cost.
How Is Fabric GSM Tested in a Factory?
A factory normally uses a GSM cutter and a precision scale. The fabric is laid flat without stretching, and a circular specimen of a known area is cut from the material. With a standard 100 cm² GSM cutter, the measured sample weight in grams is multiplied by 100.
For example:
2.8 g × 100 = 280 GSM
When the available sample is too small for a standard cutter, GSM can still be calculated by measuring the sample length and width, weighing it accurately and dividing the weight by its area in square meters.
Testing should not rely on a single convenient point near the edge of a roll. Knitted and finished fabrics can show small variations across the width or between rolls, so production control normally requires representative sampling and an agreed tolerance.
Is Higher GSM Always Better for Fleece Fabric?
No. Higher GSM means that more material weight is present in each square meter, but it does not automatically mean that the fabric is better.
A higher GSM may provide a fuller or heavier hand, but it can also increase raw-material cost, unit weight, drying time, carton weight and international freight. For apparel, too much weight may reduce drape or create bulky seams. For plush toys, a heavy and stiff backing can make small curves more difficult to sew. For an e-commerce blanket, an unnecessarily heavy construction can push the product into a more expensive shipping tier.
The best GSM is therefore the one that matches the performance and commercial position of the finished product.
Is GSM the Same as Fabric Thickness?
GSM measures weight per unit area. Thickness measures the physical distance between the two surfaces of a fabric. They are related, but they are not the same property.
Two fabrics with the same GSM may look and feel completely different because of:
- Yarn count and filament structure
- Knitting density
- Warp-knitted or weft-knitted construction
- Ground-fabric structure
- Pile height and pile density
- Brushing, shearing and polishing
- Embossing, jacquard or cut-pattern effects
- Stretch and dimensional setting
- Bonding or lamination
For example, a compact flannel fleece and a high-pile faux rabbit fur fabric may have a similar GSM. The faux rabbit fur can look much thicker because more of its material is distributed through the pile. The flannel fleece may feel denser and flatter because of its shorter pile and tighter surface.
This is why a professional specification should not say only “300 GSM fleece.” It should also identify the fabric type, composition, knitting construction, pile characteristics, usable width and finishing requirements.
How Warp Knitting and Weft Knitting Affect Fleece Selection
Most of Kingcason’s core pile fabrics are knitted rather than traditional woven flannel. Knitted fabrics are formed by intermeshing loops, which generally gives them more stretch and flexibility than woven structures.
Warp-Knitted Fleece Fabrics
In warp knitting, yarns generally run along the length direction of the fabric. Common Kingcason categories produced with warp-knitted structures include flannel fleece, coral fleece, crystal super-soft fleece, spandex super-soft fleece, PV plush and many faux rabbit fur fabrics.
Double-needle-bar warp knitting can create two connected ground fabrics with pile yarns between them. The structure is then slit through the middle, producing two pile surfaces. Ground construction, pile anchoring, slitting, shearing and finishing all influence pile stability, resilience and final hand feel.
Weft-Knitted Fleece Fabrics
In weft knitting, yarns are fed mainly across the width direction to form interconnected loops. Sherpa fleece, teddy fleece and certain other plush structures may use weft-knitted production.
The distinction matters because two products sold under the broad word “fleece” can behave differently during stretching, cutting, sewing and washing. Buyers should compare like with like rather than assuming that the same GSM produces the same result across different knitting systems.
Reference GSM Ranges for Common Kingcason Fleece Fabrics
The following ranges are sourcing references, not fixed universal standards. Actual producibility depends on yarn, machine gauge, pile structure, finishing and the approved sample.
| Fabric type | Reference GSM range | Common applications |
|---|---|---|
| Flannel fleece | 150–400 GSM | Blankets, pajamas, cushions, toys and pet products |
| Polar fleece | 150–300 GSM | Jackets, hoodies, outdoor layers and blankets |
| Ultra-soft fleece | 200–300 GSM | Blankets, pajamas, cushions and baby products |
| PV plush | 240–320 GSM | Toys, cushions, blankets and pet products |
| Sherpa fleece | 200–450 GSM | Blankets, coat linings, jackets and pet beds |
| Faux rabbit fur | 300–600 GSM | Premium blankets, cushions and home textiles |
These ranges overlap because fabric construction matters. A buyer should never use this table as a substitute for sampling.
How to Choose GSM for a Fleece Blanket
For blankets, begin with the intended finished weight and construction rather than selecting a familiar GSM at random.
Single-Layer Blanket Weight Formula
Theoretical fabric weight (kg) = length (m) × width (m) × GSM ÷ 1,000
For a 150 × 200 cm single-layer blanket made from 300 GSM fleece:
1.5 × 2.0 × 300 ÷ 1,000 = 0.90 kg
The theoretical fabric weight is approximately 0.90 kg. The finished packed product may differ because of trimming, binding, thread, labels, accessories, moisture, production tolerance and packaging.
Double-Layer Blanket Weight Formula
For a double-layer blanket, calculate each fabric separately or add the two GSM values when both layers cover the same area.
For example:
- Face: 300 GSM faux rabbit fur fabric
- Reverse: 220 GSM flannel fleece
- Finished size: 150 × 200 cm
1.5 × 2.0 × (300 + 220) ÷ 1,000 = 1.56 kg
This is the approximate fabric weight before edge finishing and packaging.
Other Factors That Affect Blanket GSM Selection
A blanket manufacturer should also consider climate, retail price, washing and drying, single- or double-layer construction, vacuum packaging, parcel weight, edge finishing and consumer preference. A heavy winter blanket and a lightweight air-conditioning throw should not use the same sourcing logic.
How to Choose GSM for Pajamas and Apparel
For pajamas, robes, hoodies and jackets, GSM affects warmth, structure and drape, but garment construction also matters. Very heavy fleece may feel substantial as a flat sample yet become bulky at collars, cuffs, pockets, zippers and multi-layer seams.
The factory should know whether the garment is intended for indoor sleepwear, outdoor layering or cold-weather outerwear. Stretch direction, recovery, breathability and sewing performance should be tested alongside GSM. For children’s products, required testing and destination-market regulations must also be confirmed separately.
How to Choose GSM for Plush Toys, Cushions and Pet Products
For plush toys, surface character and sewing performance may matter more than maximum weight. Important variables include pile height, pile density, backing strength, stretch direction, fiber shedding, seam stability and pile recovery after compression.
For cushions and pet beds, buyers often need a balance between softness, fullness and durability. Pilling resistance, abrasion, washability, bonding construction and anti-slip backing can be more important than simply increasing GSM.
What Does Fabric Width Mean?
Fabric width, also called roll width or fabric breadth, is the measurement across the roll. It may be expressed in centimeters, meters or inches.
However, “width” can refer to different stages or measurement methods:
- Greige or on-machine width: the width before dyeing and finishing are completed.
- Finished width: the edge-to-edge width after dyeing, heat setting and other finishing processes.
- Usable width: the portion that can actually be used for cutting after excluding unsuitable edges, pin marks or non-uniform areas.
For bulk sourcing, usable width is normally the most commercially important figure.
What Is Usable Fabric Width?
Usable fabric width is the effective cutting area across the roll.
It may exclude:
- Uneven or curled edges
- Selvedge or edge zones
- Stenter-pin marks
- Finishing marks
- Areas with inconsistent pile
- Non-cuttable edge defects
For example, a fabric may measure 202 cm from edge to edge but provide a guaranteed usable width of 200 cm. If the buyer’s marker requires the full 202 cm, even a small edge loss can disrupt production.
Therefore, purchase specifications should state whether the required number refers to finished edge-to-edge width or minimum usable width.
Why Does Fabric Width Change During Production?
Fabric does not necessarily leave the finishing line at exactly the same width at which it was knitted. Width can be affected by:
- Knitting machine specification
- Yarn count, elasticity and strength
- Knitting density and structure
- Dyeing and finishing method
- Heat setting
- Brushing, shearing and other mechanical finishing
- Tension control
- Required GSM and hand feel
- Shrinkage target
This is why GSM and width should be developed together. Stretching a knitted fabric wider during setting can influence density, hand feel and measured GSM. A factory cannot always change width independently without affecting other characteristics.
How Fabric Width Affects Linear Weight and Purchasing
GSM describes weight per square meter, while linear weight describes the weight of one running meter across the full width.
Linear weight in kg per meter = GSM × width in meters ÷ 1,000
For 300 GSM fleece at 2.0 meters wide:
300 × 2.0 ÷ 1,000 = 0.60 kg per linear meter
For the same 300 GSM fabric at 2.5 meters wide:
300 × 2.5 ÷ 1,000 = 0.75 kg per linear meter
The GSM has not changed, but the wider linear meter contains more square meters of fabric.
The approximate number of linear meters per kilogram is:
Meters per kg = 1,000 ÷ GSM ÷ width in meters
These formulas are useful for preliminary costing, but actual roll length and weight can vary with GSM, width, moisture and production tolerances.
How to Choose Fabric Width for Blankets
A common mistake is to order fabric with a usable width exactly equal to the desired finished blanket width. A 150 cm finished blanket normally needs more than 150 cm of cuttable fabric because the factory may require allowance for trimming, hemming, binding, sewing and dimensional change.
The required allowance depends on:
- Sewn hem, binding, overlock, shell stitch or folded edge
- Fabric shrinkage
- Cutting accuracy
- Width tolerance
- Pattern placement
- Pile direction
For oversized blankets, a wider fabric may avoid joining seams. However, wider is not automatically cheaper. If the extra width cannot be used efficiently, it becomes edge waste.
Can the Blanket Be Rotated on the Fabric?
Sometimes a rectangular product can be rotated to improve cutting efficiency, but the factory must first check:
- Printed pattern direction
- Jacquard orientation
- Pile or nap direction
- Brushing direction
- Stretch direction
- Visual shading
Pile fabrics can appear lighter or darker when viewed in opposite directions. If panels are cut in inconsistent directions, finished products from the same dye lot may appear to have different colors.
Directional hearts, animals, stripes, logos and other designs may also prevent rotation. Marker planning should therefore be completed before confirming the width.
How Dyeing, Printing and Finishing Affect the Final Specification
Fabric performance is created through more than knitting. Yarn selection, dyeing, printing and finishing all influence the final result.
Kingcason’s available development routes can include AB or two-tone yarn, cationic yarn effects, jacquard knitting, jet dyeing, pad dyeing, rotary screen printing, face-side printing, reverse-side printing, burn-out printing, embossing, shearing, brushing, embroidery, foil effects, bonding and other finishing methods.
These processes may affect surface appearance, width, GSM, stretch and hand feel. For example, embossing changes the visual and tactile surface without turning GSM into a direct thickness measurement. Bonding two fabrics creates a composite structure whose total weight should be evaluated layer by layer. Brushing and shearing can change pile character even when the nominal GSM remains similar.
Seven Common GSM and Fabric Width Mistakes
1. Treating Higher GSM as Higher Quality
GSM is a measurable specification, not a complete quality grade. Construction, yarn, finishing and consistency still need to be evaluated.
2. Comparing Different Fleece Categories by GSM Alone
Flannel fleece, Sherpa fleece, PV plush and faux rabbit fur use different surface and ground structures. The same GSM will not produce the same feel.
3. Confusing Traditional Flannel With Polyester Flannel Fleece
Traditional flannel can refer to a woven fabric. Kingcason’s flannel fleece is normally a knitted polyester pile fabric. The complete product name should be used in technical communication.
4. Using Finished Width as Usable Width
An edge-to-edge measurement does not automatically equal the guaranteed cutting width.
5. Ignoring Finishing and Shrinkage
Dyeing, setting and mechanical finishing can affect width, GSM and dimensional stability.
6. Ignoring Pattern and Pile Direction
A theoretically efficient layout may be unsuitable when the print, jacquard or pile is directional.
7. Approving Bulk Production From a Number Alone
Photos and specifications cannot fully communicate softness, pile recovery, drape and surface density. A physical sample and, when necessary, a pre-production sample should be approved.
What Information Should You Send to a Fleece Fabric Supplier?
To receive a practical recommendation, provide:
- Finished product type and intended use
- Finished dimensions
- Target unit weight
- Single-layer, double-layer or bonded construction
- Preferred fabric type and surface feel
- Required color, print or jacquard pattern
- Edge-finishing or sewing method
- Destination market and season
- Quantity and target price level
- Packaging method
- Required tests or certifications
- Delivery destination or port
With this information, a supplier can recommend a more appropriate construction, GSM and usable width instead of simply quoting the heaviest available fabric.
Kingcason’s Recommendation for GSM and Fabric Width Selection
At Kingcason, we start with the finished product. We review its use, dimensions, target weight, season, construction, surface effect, cutting layout and packaging before recommending fabric specifications.
We support customized fleece fabric type, color, print, GSM, width, pattern, finishing and packaging. Our core product range includes flannel fleece, coral fleece, Sherpa fleece, polar fleece, crystal super-soft fleece, spandex super-soft fleece, PV plush, faux rabbit fur and other pile fabrics.
Physical samples are especially valuable when comparing GSM or pile structures. Kingcason fabric samples are free; customers cover the courier charge. When the sample is approved and a bulk order is successfully placed, the sample courier cost can be reimbursed.
The correct GSM and width should help you achieve the intended product—not simply produce the heaviest or widest fabric.
FAQ: Fleece Fabric GSM and Width
What does GSM mean in fleece fabric?
GSM means grams per square meter. It measures the weight of one square meter of fabric and helps buyers estimate finished-product weight, fabric consumption and cost.
Is a higher GSM fleece always thicker and warmer?
No. Higher GSM means more weight per square meter, but thickness and warmth also depend on knitting density, pile height, yarn, ground construction and finishing. Compare physical samples rather than GSM alone.
What GSM is best for a fleece blanket?
There is no universal best GSM. The appropriate value depends on blanket size, target weight, fabric type, season, single- or double-layer construction, packaging and price positioning.
How do I calculate blanket weight from GSM?
Multiply the blanket length in meters by its width in meters and by the GSM, then divide by 1,000. For double-layer blankets, calculate both layers or add their GSM values when they cover the same area.
What is usable fabric width?
Usable width is the portion of the finished fabric that can actually be cut. It excludes unsuitable edges, pin marks and non-uniform areas. It may be narrower than the overall edge-to-edge width.
Why can two fabrics with the same GSM feel different?
They may use different yarns, knitting systems, densities, pile heights, backing structures, brushing, shearing or finishing. GSM describes weight per area, not the entire fabric construction.
How does fabric width affect the number of meters per kilogram?
At the same GSM, wider fabric weighs more per running meter and therefore produces fewer linear meters per kilogram. Use: meters per kg = 1,000 ÷ GSM ÷ width in meters.
Should fabric width equal the finished blanket width?
Usually not. Additional width may be needed for trimming, sewing, binding, shrinkage and width tolerance. The cutting layout and edge-finishing method should be confirmed first.
Can I rotate a blanket layout to use a narrower fabric?
Sometimes, but only when the print, jacquard, stretch and pile directions allow it. Directional patterns and pile shading may prevent rotation.
What should I confirm before ordering bulk fleece fabric?
Confirm the fabric type, composition, GSM and tolerance, minimum usable width, pile characteristics, color, pattern direction, shrinkage, required tests and an approved physical sample.
Ask Kingcason to Recommend a Suitable Specification
Send us your finished product type, dimensions, quantity, target unit weight and preferred fleece surface. Our team can help you evaluate a suitable GSM, usable width and approximate fabric consumption.
Website: https://kingcason.com
Email: kylin@kingcason.com
Mobile / WhatsApp: +86 189 6125 5131
