My son is a small guy (he fits size 4 still) I bought size 5... and the arms are short on these sweaters. I returned and got a 7/8 which is better and because they sweater itself Is cute. It fit all though wide.NaThis is my daughter's most worn hoodie... that being said, the print had a chip off Bluey's muzzle from the beginning... with each washing the print overall looks rougher and doesn't seem as warm as it did in the beginning... would I buy again, probably.Graphics are great, med to light weight Hoodie perfect for layering in the fallWe got this for my niece who is obsessed with Bingo and not Bluey. Finding anything with just Bingo on it is a challenge. We sized up from 3T (her size) to 4T so she’d grow into it and I’m so glad we did. She wears it all the time, so I’d say this was a great purchase.My son usually wears size 18 months but I ordered a 2T for a little more room and it fits as expected. He loves it and didn’t want to take it off.Absolutely adorable! He didn't want to take it off! It runs a bit small though, so order a size up! My son wears a 3T, we got a 4T hoping for room to grow, but it fits perfectly.Very cuteRuns smallGet at least a size larger