9" x 11.5" Stay Flat Envelope

The 9 x 11.5 stay flat envelope is built around one job: shipping 8 x 10 photo prints flat without any crease, fold or buckle. Photographers, print labs and portrait studios reach for this 9 x 11.5 rigid mailer when the contents matter more than the postage. Made from 420 GSM heavy duty cardboard, the envelope holds its shape through carrier sorting machines, rough handling and weather, so what you put in flat arrives flat at the other end.

Inside, the 8.96 by 11.46 inch cavity gives 8 x 10 prints a snug fit with just enough room to slide a tissue interleaf or protective sheet between prints. The 1.97 inch flap folds back fully so loading is fast even when you are processing dozens of orders, and the self-adhesive seal strip closes each 9 x 11.5 mailer in seconds without tape, scissors or any extra tools. The white, label-ready finish takes shipping labels and ink cleanly, which keeps your team moving when print orders come in batches. A built-in tear strip on the back lets the customer open without scissors, which is the kind of small detail that earns repeat orders from clients.

Every pack ships with 200 free Do Not Bend stickers so your carriers handle these packages with the care 8 x 10 prints deserve. The cardboard is fully recyclable, and the 9 x 11.5 stay flat envelope is priced in bulk packs to bring the per unit cost down for photo labs, print shops, portrait photographers and Etsy sellers shipping wall art, family photos and matted prints on a regular schedule.

• Sized for 8 x 10 photo prints, small documents and slim booklets with a snug protective fit
• Heavy duty 420 GSM cardboard keeps prints perfectly flat through carrier handling
• 200 free Do Not Bend stickers included in every pack for carrier visibility
• Self-adhesive peel and seal strip closes each mailer in seconds, no tape needed
• Built-in tear strip on the back gives recipients a clean, damage-free unboxing

• Portrait photographers shipping 8 x 10 portrait prints, headshots and family photos
• Photo labs and print shops fulfilling 8 x 10 print orders and matted prints
• Etsy sellers mailing 8 x 10 art prints, posters and pet portraits
• Wedding photographers delivering 8 x 10 proof prints and album samples
• Small offices mailing 8.5 x 11 documents that fit snugly without extra packaging