I recently got my grubby little mitts on a binder full of my grandparents' negatives from around the time of WW II. I plan to buy a proper negative scanner, but while I can recognize the classic 35 mm, there are also a great deal of a size that I can't quite identify. Going to Wikipedia doesn't really help, as there are tons of negatives which share sizes.
These were individually handcut and are from Europe after the war. The sizes of the actual images is roughly 6 cm x 6 cm (it might be a hair taller than it is wide, but it's difficult to tell). There are two types, both the same size. One is amber and has written along the bottom Kodak Safety Film 3251212. The other is very clear and colorless except for the image, and just says ADOX R17P.
I want to buy a negative scanner (possibly a photo scanner too as there are photos with no negatives as far as I know which also need to be preserved) but before I go spending the money, I need to know what size it is. Please help!