Butler Rockhopper Boot Sz 8 But best for Sz 7

The Rockhopper style. Made to fit over kids’ existing shoe. Good for rain or snow and dishwasher safe. This is a size 8 for toddlers. My son is a size 8 and his shoes fit but we have to squeeze in so I went up a size. The website says to buy your normal size but this would be best for a toddler who wears size 7 to give room for various shoes. Color is Navy. Worn only 3 times. Great condition.