The twig bracelets are oval and fit comfortable around the wrist contour. If you are between sizes,  size up if you like a looser fit or down if you like your bracelet to fit more closely.  I am always happy to make a custom size for you.

A small bracelet fits up to a 6 inch wrist
A medium bracelet fits up to a 6.5 inch wrist
A large bracelet fits up to a 7 inch wrist

To measure for a custom size cut a strip of paper 1/2 an inch wide and about 8 inches long.  Wrap it closely around the wrist, so it is taut but not tight, and then mark where it crosses over.  Send me that measurement and I can gauge the correct interior circumference of your bracelet.