These 100 cardboard envelopes can ship important documents, files, pictures, business cards, art prints, photos, and diplomas to your friends, family, and colleagues. The small shipping envelopes each measure 9.5 x 12.5 inches. The peel-and-seal adhesive closure allows for convenient and efficient sealing, no need to use glue or water. The high-quality, thick 450gsm clay-coated paper board construction ensures contents remain securely inside while in transit.