12 1/2 x 9 1/2 x 1 Mailers

Grouped prints and thicker paper contents require more depth than a standard flat envelope can provide. JAM Paper 12 1/2 x 9 1/2 x 1 inch photo mailers combine rigid support with an expandable profile for photographs, documents, presentation sets, artwork, certificates, and printed materials. The 1 inch expansion provides additional capacity while keeping the shipment structured.

Multiple pieces can be packaged together more comfortably when the mailing envelope is designed to accommodate added thickness. Strong paperboard helps reinforce flat contents, while a peel & seal closure keeps preparation simple for office, studio, and business use. The white exterior creates a clean professional appearance for client-facing deliveries.

Portfolios, proofs, marketing sets, photographs, and grouped paperwork can benefit from packaging that offers both width and depth. This expandable mailer provides an alternative to bulky cartons when contents need structure but remain relatively flat. Its dimensional design suits professional distribution, creative shipments, and important document mailing.