18 x 16 x 40 (4 mil) Gusseted Poly Bags 100/Case Coin Envelope Poly bag opening is always

Poly bag opening is always on the width dimension which can be heat sealed

Note the box style in the product description

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All of these Indestructo corrugated mailers / boxes are designed to create a professional appearance for shipment of your catalogs

18 x 16 x 40 (4 mil) Gusseted Poly Bags 100/Case Coin Envelope Poly bag opening is alwaysFor 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.