Bought these boot covers to complete our son's Astronaut costume for Halloween.  They look great, but are a little impractical for a 2 yr old.  I will admit that has more to do with my ambitious idea more than the product itself.  The size small say they fit up to size 7 shoes, and my son wears a size 6.  That made enough of a difference for them to be too big for him to walk around without tripping all over himself.  I know that he'll be able to use them in the future, however, along with his costume!  So, I'm happy with that, and think he will be too!