Square Flap Envelopes

Square flap envelopes give invitation suites a clean, structured finish in sizes from 2 1/4 x 3 1/2 inch to oversized 24 x 24 inch styles. Smooth, textured, linen, shiny, metallic, and recycled papers create varied looks, while gum and peel & seal closures add options for different mailing routines. These envelopes fit invitations, announcements, cards, and business mail across compact, standard, and oversized stationery needs.

Crisp flap lines give square flap envelopes a polished profile for invitations, greeting cards, announcements, notes, and professional correspondence. The JAM Paper assortment spans small specialty sizes through A-series invitations and large square styles in white, black, navy blue, and sunflower yellow. Window options add an address-display choice for select mailings, while varied proportions cover compact cards and larger presentation pieces.

Structured stationery pairs naturally with square flap envelopes made for cards, invitations, announcements, and business pieces in many sizes. Paper weights from 32lb through 130lb cover lighter correspondence and sturdier presentation pieces, giving users options based on intended use. These styles fit wedding mail, events, greeting cards, promotions, and everyday correspondence where a crisp flap shape adds a deliberate outer presentation.