VEJA V-10 sneakers

VEJA V-10 sneakers. These were gifted to me, but are too small :( I usually wear 6.5, these are size 5. I am OBSESSED with these and devastated that they are a smaller size than I usually wear. The bottoms are dirty from try-ons in the store. The store sticker tag says "worn and refinished". Technically I think this might qualify as a youth shoe. The size is: US: 5 EUR: 36 UK: 4