Hi so my ds 21 months can fit in size 6 boots and wellies but not in size 6 or 6.5 trainers. Its not a foot length issue it's more his feet are wide and high (if that makes sense) so when I put the shoes on I can't fasten them shut and he cries. I've ordered some size 7s off vinted just incase maybe he does need to side up. We normally go Clarks to get fitted but our local one shut down couple of months ago. Any suggestions if the size 7 doesn't work. Any mainstream shoes that cater to wide feet or do I need to go 30 min drive away to my nearest Clarks store and have to buy Clarks for him the rest of my life. Thanks x