A friend of the Hose Clamp Ring, this oval bangle is not adustable so be sure to select a size that you can slide your hand through. The oval shape helps it to sit on the top of the wrist. The internal bangle measurments are 65mm length x 52mm height which are equivalent to a small-medium adult women's bracelet size. For additional size, please feel free to contact me! For size reference, the model shown is a size small.