Full bleed envelopes are possible for any of the following sizes when printing 4/0: FULL COLOR ONLY # 9 Regular. # 9 Window. # 10 Regular. # 10 Window. 9" x 12" Booklet. 9" x 12" Catalog. A7 4OVER4.COM will actually print your full bleed envelope flat and then convert the flat sheet into a gummed envelope. Please contact our Support Team to assist in pricing and placing this order. Contact Support Team at Support@4over4.com or use the custom quote page to submit your request https://www.4over4.com/custom-project