Eco-friendly cardboard mailers that can be sent flat as a rigid envelope, or popped out into a cardboard box. Popular with e-commerce retailers of all sizes, including Amazon, these mailers have expandable side gussets that allow you to adjust width, length and depth to suit contents. Also known as book boxes, capacity mailers or postal M-folders, these cartons are made from 100% recyclable corrugated cardboard, offering sturdy but lightweight protection to a wide range of contents.
There are 4 sizes/products in this category:
Some of these products appear in other categories, see also:
