I was using Printfile 120-3HB for my 6x6 negs, but they hold 9 (3 strips of 3)negs of the 6x7 size. PITA when you shoot 10 on a roll. I have sinced switched to Printfile 120-4B that holds 8 6x7 negs.(4 strips of 2) At least this way I don't need to worry about single negs. One roll of ten takes 2 sheets but at least the negs are kept in pairs. Print file also makes a sheet that holds 9 individual (not 3 strips of 3 or 4 strips of 2).