12.75" x 15" Stay Flat Envelope

The 12.75 x 15 stay flat envelope is built for shipments most rigid mailers cannot handle: 11 x 14 art prints, vinyl records, oversized lookbooks, large posters, gallery prints and 12 inch LPs that need to arrive flat and intact. This 12.75 x 15 rigid mailer is constructed from 450 GSM heavy duty cardboard because oversized contents demand the structural strength to resist bending across a wider span, especially when shipments pass through carrier sorting machines or stack under heavier parcels.

Inside, the 12.71 by 14.96 inch cavity is intentionally generous. It holds 11 x 14 matted prints with comfortable margin, fits standard 12 inch vinyl records with protective sleeves intact, accommodates large format lookbooks and catalogs, and gives oversized art prints the room to ship without folding. The 1.97 inch flap folds back fully for loading larger items quickly, and the self-adhesive seal strip closes each 12.75 x 15 mailer in seconds without tape or scissors. The white, label-ready finish takes ink, stamps and shipping labels cleanly, and a built-in tear strip on the back keeps the unboxing clean even on a larger format envelope.

This is the size art galleries, vinyl record sellers, large format photographers, art print Etsy shops and frame shops reach for when standard rigid mailers run out of room. Every pack ships with 200 free Do Not Bend stickers, the 450 GSM cardboard is fully recyclable, and bulk pack sizes (including the 180 count case) bring the per mailer cost down for businesses that ship the 12.75 x 15 stay flat envelope as part of high volume art, music or oversized print fulfillment.

• Sized for 11 x 14 art prints, 12 inch vinyl records, oversized lookbooks and large posters
• Premium 450 GSM heavy duty cardboard for structural rigidity on oversized contents
• 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
• Bulk case pack of 180 brings the per mailer cost down for high volume art and record fulfillment

• Art galleries and print sellers shipping 11 x 14 wall art, signed prints and gallery pieces
• Vinyl record sellers shipping 12 inch LPs and album packages flat and intact
• Large format photographers delivering 11 x 14 portrait prints and gallery samples
• Poster shops and frame stores mailing oversized prints with rigidity protection
• Magazine publishers and catalog producers shipping oversized lookbooks and special editions