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12 1/2 x 12 1/2 Square Envelopes

12 1/2 x 12 1/2 Square Envelopes for Large Flat Contents

Documents, prints, cards, promotional pieces, and other oversized materials often need more space than standard envelopes provide. JAM Paper 12 1/2 x 12 1/2 square envelopes offer a spacious option for business materials, event pieces, artwork, and other substantial flat contents. Their square proportions keep larger items neatly enclosed without shifting to a narrow rectangular package.

White Square Envelopes with Peel & Seal Closure

A clean white finish gives these oversized envelopes a simple, professional appearance for offices, schools, creative studios, agencies, and formal projects. The Peel & Seal closure makes preparation easier without requiring separate adhesive. This size works well when larger materials need to be packed, labeled, or distributed efficiently.

Oversized Envelopes for Business & Creative Organization

Beyond mailing, these large square envelopes can help organize materials before presentation, filing, or delivery. Campaign pieces, drawings, event documents, photographs, and client materials can be grouped by project or recipient. Their generous dimensions provide a practical solution for items that do not fit comfortably inside smaller stationery envelopes.