It's EXTREMELY important to get sized correctly as MOST of our rings cannot be sized down! We now offer a sizing set that you can and probably should order with your ring. Once you place the order a sizing set is shipped out ahead of time to confirm all sizing, simply reply to the checkout email or send one directly to firstname.lastname@example.org
Wider bands will generally fit a bit more snug so for example; currently you wear a size 9 and the band you have now is 4mm wide, you want to get an 10mm wide band, you may find a 9.25 or 9.5 to be a better fit in a 9mm or larger band. Luckily they can be sized up about a half size at no charge, just cover return shipping.
Most bands unfortunately CANNOT be sized down. If you need help deciding the best size, I suggest you visit a local jeweler for sizing then email me and we can get the best size for you in the width you want.