WAAAAIT!!!!! Simon, the 122 format is 3 and 1/4 for IMAGE size. The film itself is 3.715" or about 94mm.
I will PM you as well.
Originally Posted by Simon R Galley
Well you are lucky as we will be making 122 FORMAT roll film available in slittings ( in HP5+ only )
on a purely technical point we make 122 FORMAT as being 3 and 1/4 wide 82.55mm.