Square Bottom (SOS) Kraft Paper Bags
Engineered with a rigid rectangular block base and 4-panel side gussets. Our SOS bags stand upright unsupported for rapid automated filling in supermarkets, takeaways, cloud kitchens, and grain packing facilities.
Industrial Grade Structural Integrity
Square bottom bags (also known as Self-Opening Sacks or SOS) offer the highest volume-to-surface ratio of all paper bag geometries. The block-bottom configuration prevents tipping, protecting hot food containers and fragile retail items during delivery and customer handling.
- Self-standing structure for quick bagging at checkout counters.
- High Burst Factor (BF 20–35+) with tear-resistant side gussets.
- Available handleless, with flat internal handles, or with die-cut grips.
- Food-grade certified paper and odor-free food safe adhesive.
Technical Specifications & Standard Sizing Table
Custom dimensions can be engineered to match your exact container filling or delivery box dimensions.
| Size Reference | Dimensions (W x G x H) | Recommended GSM | Weight Capacity | Primary Applications |
|---|---|---|---|---|
| Small SOS | 150 x 90 x 270 mm | 60 - 70 GSM | Up to 2.5 kg | Pharmacies, bakeries, coffee beans, cosmetics |
| Medium SOS | 260 x 140 x 320 mm | 70 - 90 GSM | Up to 6.0 kg | QSR food delivery (Swiggy, Talabat), apparel |
| Large Grocery SOS | 320 x 170 x 420 mm | 90 - 120 GSM | Up to 12.0 kg | Supermarkets, flour packing, organic grains |
| Extra Large Bulk | 350 x 200 x 480 mm | 110 - 140 GSM | Up to 16.0 kg | Industrial hardware, institutional supply |
Custom Flexographic Printing & Branding
Transform your packaging into a high-visibility marketing asset. We provide precision flexographic printing in up to 4 colors, reproducing corporate logos, regulatory recycling symbols (e.g. Italian CONAI PAP 22), barcodes, and QR codes with crisp edge definition.