If they already wear rings, just sneak one and use the second option in our ring sizing tool to measure it - that way, you’ll know their exact size.

If they don’t have any rings to borrow, no worries - here are the most common sizes to go with:

Women: Size 7
Men: Size 10

And if it’s not quite right? No stress. Every order comes with a free ring sizer, plus:
Choose instant exchange - we’ll ship the new size within 48 hours, and you’ll have 7 days to return the original.