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 A74OVER4.COM will actually print your full bleed envelope flat and then convert the flat sheet into a gummed envelope.