Rigid All Board Envelopes CP 010.07 are 303mm x 413mm externally with a variable capacity that at a maximum depth gives internal measurements of 290mm x 400mm x 50mm*, ideal for B4 sized items such as clothing and textiles, frames, artwork, magazines, menus or other literature and items that need to be protected during transit. The capacity of these envelopes is easy to adapt due to pre-creased grooves that simply fold to the required depth. They also include self-seal adhesive strips and are safety tested to eliminate risk of paper cuts so the packing process is safe, fast and stress free. Much better than using cardboard boxes that need extra filler and cost more to post. An easy-open tear strip offers customers similar ease in opening packages on delivery. Made in robust E-flute corrugated cardboard with reinforced edges and corners, Rigid All Board Envelopes offer unrivalled protection ensuring your items arrive in mint condition. *Effective size decreases with increasing thickness