HP Deskjet 6122 Color Inkjet Printer - Manual (Page 116)

A4 210 x 297 mm
Transparencies:
U.S. Letter 216 x 279 mm (8.5 x 11 in)
A4 210 x 297 mm
Photo (with tear-off tab):
102 x 152 mm (4 x 6 in)
print cartridges
Black: selection number 45, part number hp 51645
Tri-Color: selection number 78, part number hp c6578
Labels:
U.S. Letter 216 x 279 mm (8.5 x 11 in)