A-A-2017 Box, Fiberboard, Special Use (Post Office Money Order Forms)This description covers Post Office Money Order Forms Box, Type II. Type II shall be one-piece, tuck-end style (OPTE), modified as shown in figure 1. The size shall be inside dimensions, in inches, as follows, with a tolerance of minus 0, plus 3/16 inch. Lenght 8-1/2 Width 4 Depth 3-1/4