Not a clue, Glad, but a little tip about how to use this forum. Put something in your subject line that describes the nature of your problem (like "TM-U220 Epson won't print 12,5 mm labels"). That'll attract the sort of eyeballs that may come equipped with an actual answer. Furthermore, it'll mean that future forum users with the same question as yours can find it easily using a keyword search.
Good work in flagging it as a question to be answered, tho. Some users overlook that feature, and it offers benefits of its own.
Oh, i understrand. Thank you for the help.