6 3/4 Green Envelopes-Regular Envelope-500/box 3 5/8" x 6 1/2"(Green) #6  Blank Regular envelopes are used by most businesses as a return envelope as it fits great when inserted in the #9 and #10 Standard Envelope Our 6 3/4 Green envelope is the envelope to use when you want your mailing to make a splash By using colored envelopes a business would be able to take their mailings and letters to the next step,also Great for birthdays and other special occasions! (#6-3/4) 3-5/8" x 6-1/2" Moisture activated gummed seal. Check O Matic 100% Satisfaction Guaranteed. 500Box