I included this information to help you compare to the sizes to the products on this web page.

1 inch = approximately 26 mm

1 ounce = 28.349 grams

1 troy  ounce = 31.103 grams

1 gram = approximately 5 carats

32 grams = approximately 160 carats

Quarter = approximately  24 mm

Nickle = approximately  21mm

Penny = approximately  19 mm

Dime = approximately  17 mm

Weights and Measures