^^^^^
Just checked.
My adidas boost shoes are 9,5UK/10US and they are perfectly fitting.
My nike basketball regular size is 9,5UK/10,5US ( wtf , 9,5UK is 10US for adidas and 10,5US for nike ??? ) and they are fitting great too.
For some reason i do not recall, i got the power perfect IIs much bigger, 11UK/11,5US which is 1,5 size up from the same brand trainers.
My PPs are spacy for sure, but it is not like they are huge, probably got them half a size bigger than i should. Not sure why i went 1,5 size up, maybe there was no 10,5/11 availability so i chose the upper side.
Anyway, all the reviews say they run kinda small, one size up is a "safe" choice, but if you can try them at that local store, then that is the best ( captain obvious ).