hey i just got my new apple watch and the watch band is a size too big, is there a way i can return it for a smaller size

Exchange an item

If you purchased your item from Apple in the U.S., you can take it to any U.S. Apple Store for an exchange. Item exchanges are, of course, subject to in-store product availability. It's a good idea to check if a product is in stock by visiting apple.com and then seeing if it's available for pickup at a store nearby.

For more info and options, see:

Returns & Refunds - Shopping Help - Apple