Rigid Mailers 17' x 21' (50-Pack) - Kraft Mailer Envelopes for Large Artwork, Posters, Blueprints - Stay Flat

STAY-FLAT RIGID PROTECTION: Heavy-duty self-sealing rigid mailers constructed from sturdy cardboard help keep contents flat and secure during transit. Perfect for safeguarding photos, artwork, certificates, and important documents. 17' x 21' SIZE FOR OVERSIZED ITEMS: Oversized cardboard mailer envelopes designed for large prints and paperwork. A superb choice for photos and documents when wide coverage and neat edges are required. BULK 50 PACK VALUE: Stock up for home businesses, offices, and shipping stations. This 50-count pack of cardboard envelopes allows for uniform packing, quicker fulfillment, and a lower cost per mailer. CLEAN, PROFESSIONAL LOOK: Classic kraft brown, presentation-ready hard envelopes for mailing that appear polished for clients, classrooms, studios, and official document shipments. They are simple to label and barcode. SHIPPING + STORAGE MULTI-USE: Use as 'do not bend' envelopes, for eCommerce fulfillment, photo & art shipping, certificate mailing, or flat storage. Dependable cardboard mailers for shipping, packaging, and organization. Crafted in the USA from recycled materials