GREAT FOR - The inside measurement of the corrugated easy fold mailer is 12.125 x 9.125 x 2 inches, ideal for shipping booklets, etc.;FLEXIBILITY – These white cardboard boxes have scores at multiple depths at 0.5 1 1.5 2 inch to ensure the proper fit for your products;EASY TO USE – Simply put your products in the center of the box, fold at the depth as you desire, then seal it by tape. Elegant to show your professionalism. You can also paint or stick your own labels for customization;SUPER STRONG YET LIGHT WEIGHT - The one-piece folding mailing box is manufactured from 32ect-E kraft cardboard, very sturdy yet light weight (only 3.5 ounce per piece), can save your postage and protect your items well;BUY NOW RISK FREE - If for any reason, you don't absolutely like the white cardboard box, just return it, and we'll refund every penny (or replace it, if there is a problem).