When ordering bags for the first time, two terms come up constantly: GSM and size. Getting these right is the difference between packaging that performs — and a bag that bursts at the seam, or one that is heavier and more expensive than you ever needed.
What Does GSM Mean?
GSM is the fabric weight per square meter (grams per square meter). Higher GSM means thicker, heavier, stronger fabric — and a higher price. A 50 gsm bag is fine for a 25 kg package, but the same GSM for a 100 kg bag would be a disaster!
Recommended GSM by Content Weight
| Content Weight | Bag Type | Recommended GSM |
|---|---|---|
| 10 – 25 kg | Valve / plain | 65 – 80 g |
| 25 – 50 kg | Valve / laminated | 80 – 100 g |
| 50 – 100 kg | Laminated, double-stitch | 100 – 120 g |
| 500 kg – 1 ton | FIBC jumbo | 140 – 180 g |
| 1 – 2 tons | FIBC / 8-loop | 180 – 220 g |
How Is Size Determined?
For valve and laminated bags, the key dimensions are width and length. A practical rule: divide the product volume by its density to estimate the packed volume, then leave 10–15% headroom for top stitching. Laminated bags are produced from 25 cm up to 2.20 m wide, so almost any size is orderable.
For FIBC jumbo bags you need three figures: length × width × height (e.g. 90×90×120 cm), plus the top and bottom closure type (spout, open or discharge) and the lifting loop style.
Common Ordering Mistakes
- Choosing GSM by price alone: lighter is cheaper, but a torn bag in transit costs far more than the saving.
- Sizing without calculating product volume: too small bursts when filling; too large wastes warehouse space and freight.
- Forgetting stitch type: above 50 kg, double-stitched bottoms are essential.
- Ordering without sample approval: always produce and approve one sample with final specs before bulk production.
FAQ
What is the minimum order?
The minimum order at Fakher Kimia is 100 pieces. Larger volumes get tiered pricing.
Can I order an exact custom GSM?
Yes — all sizes and GSM values are fully custom. Just tell us your product weight and handling conditions.
Conclusion
The right GSM and size guarantee both packaging quality and cost efficiency. The simplest path: send us your product weight and type, receive a technical proposal and quote, and approve a sample before production.