Back Order Your Envelopes Here. Name * First Name Last Name Email * Phone * (###) ### #### Envelope Type & Size A2 (4.375 in x 5.75 in) A6 (4.75 in x 6.5 in) A7 (5.25 in x 7.25 in) #9 (3.875 in x 8.875 in) #9 with windows #9 with tint #10 (4.125 in x 9.5 in) #10 with windows #10 with tint Other Other Description How many would you like? Additional Description Thank you! Interested in Every Door Direct Mail (EDDM)?Start by visiting UPS.com to gather your mailing information. Once you have your details ready, send us your information and design file—we’ll handle the rest!