#10 Window Envelopes
Shop a wide variety of #10 window envelopes, and get free standard shipping! Choose from standard, security tint, regular gum flap or convenient self-seal options. The #10 window envelope is the most popular envelope for mailing letters, invoices, standard checks, or marketing materials.
This envelope measures 4 1/8 inches tall by 9 1/2 inches wide. The window size is 1 1/8" tall by 4 1/2" wide, and is located 7/8" from the left and 1/2" from the bottom of the envelope. The poly film window easily allows for a preprinted mailing address to show through the envelope.
Choose a security tint envelope to help hide sensitive information. Available in a standard gum flap (requiring moisture to seal) or convenient self seal options like flip and & seal latex or a peel & seal strip.