Keketer standard #10 colored envelopes, each measuring 4.13 x 9.49 inches—perfect for business letters, checks, invoices, and personal mail, meeting both office and daily mailing needs. Crafted from quality paper, they're tear-resistant to keep documents safe during transit, and the opaque material protects privacy, ideal for checks, invoices, or private correspondence. Featuring a self-seal adhesive strip, they're easy to use—no glue or licking needed; just peel the strip and press to seal, quick, mess-free, and secure for letters, invitations, or important mail. Versatile for all scenes, they work great in offices for mailing documents and in personal settings for party invitations (birthdays, holidays), thank-you notes, or gifting, adding charm to every mail. Plus, the smooth surface is compatible with pens, markers, or stamps, with no smudging when writing addresses or notes, convenient for personalization.