Doesn't correspond to any size I'm familiar with. I suspect it may be deliberately mis-sized to prevent exactly what I was trying to do.
22" roll size is not completely uncommon (think it's fairly popular with plotter printers), though I'd rather expect blank printer margins that need to be cut off so a 22" roll actually seems unlikely. Margin of an inch on each side (bit much, but possible) gets us to a 24" roll which might explain the confusion.
Ask not the Eldar a question, for they will give you three answers; all of which are true and horrifying to know.