This Set Of Ring Sizers Combines The Best Of Both Worlds. You Get Usa Sizes 1 Through 16, And International Sizes 1-36, 41-76, And1- 15.5. It's Like Getting Two Sets Of Ring Sizers For The Price Of One. This Is A Really Economical Way To Meet All Your Ring Sizing Needs.* Great For Jewelers, Crafters, And Designers * Rings Are Made Of Sturdy Plastic * Sizes Are Clearly Etched On Each Ring