The most common envelope size is the #10 envelope (4.125 x 9.5). This is the size you would typically receive your bills in. The #9 envelope (3.875 x 8.875) is the slightly smaller sized envelope which fits nicely into the #10 envelope. This is typically used as a return envelope for bills and invoices etc.
Adding a window to your envelope allows you to print the delivery address onto the contents of the letter rather than having to individually print each envelope. This is typically how you receive your bills.
Our envelopes are the standard ‘glue’ seal envelopes and white on the inside. If you need self-adhesive or ‘security’ envelopes (envelopes with a tint inside) please contact us for a custom quote..