Quicksilver boys flip flops bright blue strap size 12 toddler Never worn

Quicksilver little boys flip flops with bright blue strap, size 12 toddler. Size on hanger states 13 US UK 12, sticker on bottom of both flip flop states USA 12 UK 11, measurement heel to toe approx 8”,I checked the underside of both straps and didn’t find a stamped size. If you have questions,please don’t hesitate to ask New with packaging,no box,never worn