The standard bag is a basic rectangle. Sizing of bags very much depends on the purpose for which the bag will be used. For instance, a common dimension for shipping containers is 89cmx 89cm, however, 74cmx 74cm or 104 cm x 104 cm might be better for rail freight. If just being used for storage, taller or wider bags may be preferred.

In big bags, working loads from 500kg to 2,000kg are possible. Fabrics are designed to meet a minimum of 5:1 safety factor. However, denser, stronger fabrics of 6:1 or higher can be manufactured.

Fabrics woven with a breathing stripe allow the passage of more air ( necessary for products like potatoes) while maintaining the integrity of the bag. Coated fabrics are suggested for use with either fine powder products or those sensitive to moisture.