i selected size 28 even thought the size chart says my son is size 26. the size 26 of ST2.0 was a bit tight for my son.. getting size 28 for ST next seems to give a great fit.. the tightness is still there since it's a tech suit but not too tight compared to the size 26 we got before..
this is our trusted brand for tech suit for my son. my only concern is the size.. i need to go one size higher.

The size that I ordered for my son fits perfectly.

Measured my son and it suggested I should take a size 26, however had to send back as thought the were too small. Couldn’t exchange as they don’t exchange, but refunded quickly and despatched new order quickly.