7 x 4 x 18 (2 mil) Gusseted Poly Bags 1000/CaseFor gussetted polybags, the first dimension is always the width, the second is the depth of the gusset, and the third is the length from the opening to the seal. All poly bag sizes meet FDA and USDA specifications for food. Your product's contents are always visible through these clear low density polyethylene bags. Gussetted poly bags provide extra space for small or large bulky items.