so i just bought some air forces for my baby on vinted ( yes cause i think paying 50£ for trainers to last a couple of months is not very worthy, and they were perfect condition and i only paid a tenner) they are size 4.5 uk, and my baby is about to turn 1yo. i never put trainers on him before, so i don't understand nothing of sizes. will that fit him? 😂 or what size is for 12-18 months old??