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Here is a detailed cotton fabric weight chart and the conversion between GSM (grams per square meter) and OZ (ounces per square yard):
1 oz/yd² = 33.906 GSM
To convert GSM to OZ: divide GSM by 33.906
To convert OZ to GSM: multiply OZ by 33.906
Approximate conversion: 1 oz/yd² ≈ 34 GSM, 1 GSM ≈ 0.0295 oz/yd²
| Weight Class | GSM Range | OZ Range (oz/yd²) | Common Fabric Examples | Typical Uses |
|---|---|---|---|---|
| Ultra Light | Under 100 GSM | Under 3 oz/yd² | Chiffon, voile, lace, tulle | Lightweight dresses, scarves |
| Lightweight | 100 - 170 GSM | 3 - 5 oz/yd² | Lightweight cotton shirting, chambray | Shirts, blouses, summer dresses,drawstring bag |
| Midweight | 170 - 340 GSM | 5 - 10 oz/yd² | Midweight cotton, twill, denim | Pants, jackets, structured dresses,Tote bag |
| Heavyweight | 340 - 400 GSM | 10 - 12 oz/yd² | Heavy canvas, denim, fleece | Jeans, coats, upholstery,Tote Bags |
| Ultra Heavy | Over 400 GSM | Over 12 oz/yd² | Winter wear, heavy coats,Tote bags | Heavy duty denim, waxed cotton |
Choosing the right fabric weight is essential for making eco-friendly bags that are both functional and durable. The chart below shows the conversion between OZ (ounces per square yard) and GSM (grams per square meter), along with typical bag types for each weight
| OZ (oz/yd²) | GSM (g/m²) | Typical Bag Example/Use Case |
|---|---|---|
| 4 | 136 | Lightweight promotional tote bag,Thank you bag,drawsting bag |
| 6 | 203 | Standard reusable shopping bag,Cheap Simple Totes |
| 8 | 271 | Durable grocery bag, drawstring backpack,Brand Shopping Tote bag |
| 10 | 339 | Heavy-duty tote, conference bag |
| 12 | 407 | Sturdy beach bag, multi-purpose carryall |
| 14 | 475 | Heavy canvas tool bag, book bag |
| 16 | 542 | Extra strong laundry bag, equipment bag |
| 18 | 610 | Industrial-use sack, oversized storage bag |
| 20 | 678 | Extra-thick tool bag, heavy-duty duffel |
Tip:
Lower GSM/OZ = lighter, more flexible bags (good for giveaways, light shopping).
Higher GSM/OZ = stronger, more durable bags (ideal for groceries, tools, or heavy loads).
In the bag and luggage industry, jute bags are commonly measured by their weave density—that is, the number of threads per inch in both the warp (lengthwise) and weft (widthwise) directions. This is usually expressed in the format “warp count X weft count” (e.g., 50×50). The higher the numbers, the denser and tighter the weave.
| Weave Density (Warp x Weft per 10cm) | Description | Typical Application |
|---|---|---|
| 60 x 60 | Extra dense, fine | High-end bags, premium printing |
| 50 x 50 | Dense, standard | Standard ,Most factories use this to make Premium shopping/tote bags |
| 45 x 45 | Medium-dense | Simple shopping bags |
| 40 x 40 | Medium | General packaging, sacks |
| 35 x 35 | Medium-loose | Flood control bags, sandbags |
| 26 x 26 | Loose | Agricultural sacks, bulk bags |
| 16 x 16 | Very loose, coarse | Heavy-duty, low-cost packaging |
Key Points:
Warp: Threads running lengthwise (vertical).
Weft: Threads running widthwise (horizontal).
The numbers indicate the count of threads per inch in each direction.
Higher numbers = tighter, stronger, and often more expensive fabric.
Example:
A 50×50 jute bag means there are 50 threads per inch in both the warp and weft directions, resulting in a strong, dense fabric suitable for premium bags.
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