Trapezoid is just under 1" long and 1/2" wide at the top.  Cox measures approximately 3/4inch across. The copper has an uncoated, fired, colorful finish.

Copper can leave a green smudge on skin, especially sweaty skin, but a coating of clear nail polish (enamel) on back of the copper can prevent this, and if you wish to preserve the original finish, on front as well. 

Please note, these are handmade and color/texture of copper may vary.