Two finger holes and a large rubber dowel for use on the rings.
Velcro wristband closure.

Measure from base of palm to tip of longest finger.
Available sizes:
XSmall (0) - up to 6-1/2" (GR-3506X)
Small (1) - 6-1/2" to 7" (GR-3506A)
Medium (2) - 7" to 7-1/2" (GR-3506B)
Large (3) - 7-1/2" to 8" (GR-3506C)
XLarge (4) - 8" and up (GR-3506D)