Most styles fold together in seconds without tape
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Sizes shown are the inside dimensions of the box in the following order: Length
Note the box style in the product description
Cartons have a FOL (full over lap) bottom for added strength
11 1/4 x 3 x 15 1/8 Side Loading Self Seal White Mailer 25/Bundle 12 x 12 box Most styles fold together inAll of these Indestructo corrugated mailers boxes are designed to create a professional appearance for shipment of your catalogs, literature, parts, photos, printed material, etc. Note the box style in the product description. Choose from six styles: Standard Protective Mailers, Outside Tuck Mailers, RSC Boxes, Multi Depth Bookfolds, End Loading Mailers, and Jumbo Fold Over Mailers. Most styles fold together in seconds without tape, glue or staples.