Get your mail pieces opened with our Next Day Express Marketing Envelopes with your custom return address.Orders are processed NEXT Business Day from Proof approval. Type: #10 Regular Peel-n-Seal Security Envelopes (9 1/2 x 4 1/8″) Print: Next Day Express with Custom Return Address Area Paper: 24lb. White Wove Print Method: Commercial PressArtwork: After purchase we will contact you for return address information and then send proof for approval before printing. Shipping: USPS Priority Mail