An illustration of a whimsical colorful cat is sealed under a glass dome and mounted in a decorative pendant setting.  The dome is approximately 1" in diameter and pendant is about 1 3/8" in diameter plus the ring at the bottom.

This holder will work well for both eyeglasses and work/ID badges and will accommodate most eyeglass stems (The inner diameter of the ring is about 3/4", if you have wide stems, it would be best to measure them).  

A super strong neodymium (rare earth) magnet is affixed to the back with an industrial grade adhesive. A second magnet is supplied to go under your clothing to secure the holder in place. 

(Caution: These are strong magnets and should not be worn by anyone with a pacemaker or medical implant.) 

Thanks for looking.  Purchase with confidence knowing that your satisfaction is guaranteed.  If you have any problems, I will gladly resolve your concerns.