Some full size up and some half size up. The Indy boots are tighter around the heel and instep than the 4444 last and all around narrower. I would imagine the instep is about the same as the 4497 last. Basically, if you find Trickers lasts roomy, full size up, if they fit perfect, half size up.Also, man, I never get lucky with retricker. I never seen anything in my size that I want and stuff that is in my size is generally meh.