Took our 5 year old for his this week. Ended up with 9-10 being the best fit.
Given the crap quality of the ugly kit he actually opted for the training gear. Slightly better sizes in those. Think he’s still 7-8 or something like that.
For a 5 year old
4 or 5 others in the shop at the time grumbling about the quality (feel) of the kits being poor & the sizes being miles out.
Good start from Kappa