11 1/2 x 11 1/2 Square Envelopes

Oversized announcements, artwork, documents, flyers, marketing pieces, and other broad flat materials require more space than standard stationery envelopes provide. JAM Paper 11 1/2 x 11 1/2 square envelopes offer generous space for larger inserts while helping them remain flat and neatly contained. The square design is well suited for business, creative, and organizational use.

A clean white finish gives these oversized envelopes a simple, professional appearance for offices, studios, schools, agencies, and personal projects. The spacious dimensions accommodate artwork, presentation materials, promotional pieces, large cards, and documents. The neutral surface also provides plenty of space for addresses, labels, branding, or other identifying details.

When large flat materials need to be grouped before filing, distribution, or delivery, this size provides a practical organizational option. Marketing teams can separate campaign pieces, artists can keep related prints together, and offices can organize documents by project or recipient. The 11 1/2 inch square size offers a useful solution for materials that exceed standard envelope dimensions.