I've just recently bought myself my very first mechanical keyboard and, since I really dislike the Win 7 logo, I decided to replace both OS keycaps on my Quickfire TK.
I'm actually quite fond of
this keycap from WASD Keyboards, but I'm a complete noob so I have no idea what keycap size I've got to choose to fit on my TK German ISO OS keys. I'd be quite happy if you could tell me or even suggest a different keycap that'd fit.