Rigid Mailers 13" x 18" (100-Pack) - Cardboard Mailer Envelopes for Posters, Photos, Presentation Materials - Stay Flat

STAY-FLAT RIGID PROTECTION: Heavy-duty self-sealing rigid mailers constructed from sturdy cardboard help keep contents flat and secure during transit. Ideal for safeguarding photos, artwork, certificates, and important documents. 13" x 18" SIZE FOR LARGE ITEMS: These oversized cardboard mailer envelopes are designed for larger prints and paperwork, offering a great option for photos and documents when wide coverage and clean edges are required. BULK PACK VALUE: A 100-count pack of cardboard envelopes supports consistent packing, faster fulfillment, and improved cost efficiency for home businesses, offices, and shipping stations. CLEAN, PROFESSIONAL LOOK: Bright white, presentation-ready hard envelopes maintain a sharp appearance 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 e-commerce fulfillment, photo and art shipping, certificate mailing, or flat storage. Dependable for shipping, packaging, and organization. Made in the USA and constructed from recycled materials