1) these are clear glass cabochons, with a designed image on paper adhered to the back. The image is well adhered and not prone to deterioration under normal use

2) there are a total of 12 designs, usually you will get in pairs, including 10 or 12 designs , depending on the size you choose, but for size of 30mm, you will get single design, each 1 piece

3) a good craft glue or adhesives should be used to set these into or onto the findings. These work best in a finding that is enclosed at the back to eliminate the showing of the white paper. Please see photos for pratical application 

4) package per size

10mm 12mm 14mm 18mm is 50pcs per bag

20mm 25mm is 20pcs per bag

30mm is 12pcs per bag