CP 010.01 Rigid All Board Envelopes measure 167mm x 268mm flat and are pre-creased for a variable capacity of up to 50mm. At maximum capacity of 50mm the internal dimensions are 150mm x 250mm x 50mm*, an ideal size for sending textiles, electronic components or paperback books. The envelopes are made using rigid brown E-flute corrugated card that offers complete protection for higher value items in the post. Resistant to bending and reinforced to keep edges and corners sharp, Rigid All Board Envelopes ensure your items arrive in perfect condition. A permanent self-adhesive strip creates a tamper proof seal and there is and easy-open tear strip to help customers to access goods quickly. The pre-creased grooves make it easy to form the envelope into the correct depth for your item creating a snug fit for extra protection. This means packing is quick and easy with no need for extra void fill. The compact design also reduces postage costs compared with using larger boxes. *Effective size decreases with increasing content thickness