Size 1 (MJ1) MailJacket™ cardboard capacity mailers are boxed in 100s and are best suited to smaller books, DVDs and items of similar dimensions. Peel and seal closure, long edge insertion, a smooth card interior, and the perforated ripper strip all make MailJacket™ mailers extremely fast and efficient to use. Capacity creases in the 400 GSM, 100% recycled solid board allow MailJacket™ to expand to fit the item snuggly, reducing rattling and damage and allowing for a variety of item sizes to fit. The thin walls and carefully chosen dimensions ensure that your items cost less to pack, fit through all UK and EU letterboxes and qualify for lower-cost postal services - saving postage money, reducing returns and minimising in-transit damage.