A:
Google or Wikipedia 120 film!! "120" film comes in different image "lengths", but the image height is 2-1/4", with the image length varying by the format of the camera being used.
The various sizes of "120" are 2-1/4" by "X" (or 6cm x "X"cm). "120" (or 220, no paper backing except leader) provides images of 6cm x 4.5cm, 6cm x 6 cm, 6 x 7 , 6 x 8, 6x9, etc. 6x6 is 2-1/4" square (12 images), 6x7 is 2-1/4" x 2-3/4" (or "8X10" format -like in the Pentax 67, is 10images), 6x9 is 2-1/4" x 3-1/4" (8-images). The 120 negative holder that comes with the V-600 handles them all. 620 film is the same as 120 film, except the spool was thinner.
I have MANY negs in 120, in 6x6, 6x7, and 6x8 (yeh, I'm an old f*rt..!), and they all fit fine in the V-600 large format holder -just read the instruction (download the full user manual from the Epson website).