If you’ve ever ordered custom non-woven bags only to see handles tear off within weeks, or received bags too small to actually hold what your customers are buying, the root cause traces back to two specs most B2B buyers rush past on a spec sheet: GSM and capacity. GSM, or grams per square meter, determines how durable your fabric is, while capacity determines whether the bag physically fits the job it’s meant to do. Get either one wrong on its own and the other can’t save your order. This guide breaks down both specs, shows you how they work together, and includes a free capacity calculator below to help your team size a bag correctly before you commit to a bulk order.<\/p>\n