Help with shoe size conversion please!!!!!!

[TooTicky]

I can't find a useful website that actually works.
I need to know child size 11.5 in European please.

[FabioTheLiterateCat]

11 is European 29
12 is European 30

11.5 doesn't exist!

I'd go with a 30

[TooTicky]

Thank you thank you thank you