Smooth white All Board Envelopes, measuring 248mm x 330mm, manufactured using premium grade 500 micron, 350gsm, GD2 fully coated chipboard. These envelopes have greater capacity than our C4 version, so fit A4 catalogues and A4 sheets in greater quantities. A key benefit of using these envelopes is their time-saving qualities, they are closed using a pre-folded flap that has a peel and seal strip - it’s quick, simple and secure. Using the peel-open strip, the receiver can access the items inside quickly. You can print onto their smooth surface, or stick self-adhesive labels. Choose these sturdy board envelopes when sending paper, card and slim items that require additional protection during transit.