Do you remember the Spirograph toy that made the geometric patterns?  Our Pinwheels remind me of the patterns made with a Spirograph.  They are almost fluid.  The metal of our Pinwheels appears to bend as they move. 

The Double Drop Pinwheel Earrings dangle 1 3/4".  The top pinwheel measures a little over 1/2" (14mm) x 7/16" (11mm) and the bottom measures a little of 3/4" (20mm) x a little over 1/2" (14mm).