The traditional rounded inside jade bangle bracelets are my favorite, because the roundness stimulates the acupressure points on the wrist promoting good health. But I do love an oval jade bangle, because they fit even closer to your wrist. If you get the smallest oval that you can get on your wrist, it will be extremely comfortable, not move around, and look fantastic.
An oval jade bangle is deceptive and you need to really think about what size you need. Just because you might wear a 55mm round bangle doesn’t mean you will be able to wear a 55×47mm bangle, for example. To determine how an oval will fit, add the two numbers (55+47=102) and divide by 2 (51). So if you can wear a 51mm bangle, then you can wear a 55×47mm bangle. If you usually wear a 53mm bangle, but if you really work hard can wear a 51mm bangle, then you will be able to wear this size.