- Aug 18, 2013
- 3,521
- 2,519
The Y3 runs at least a .5 size big. Some are able to go down a full size from there UB size. I'm a 12 in UB and went with 11.5 Y3 and still have a bit of room.
the y3 pureboosts are THAT roomy? might give the UK12 a shot then...