Bought size 6 and it comes with medium wheels, it's easier to balance than my other pair with small wheels. Bought this for my son actually but we ended up fighting for it coz medium wheels is nicer! My son asking me to get something with mega wheels!
It's a well made pair of shoes. Not very heavy.

Update: it is still in perfect condition after mths of playing/rolling. If ur feet is 23.5cm, get a size 6.