All snaplock coin cases are 2 x 2" and about 1/4" thick. These clear, snap-together plastic cases come with a black pre-cut foam insert to hold the coin in place. Snaps also protect the coins from tarnishing elements such as humidity and drastic temperature changes. Snaplock cases are available for coins 16mm-41mm and are interchangeable with the displays I sell on my Display Page. Standard US coin sizes are listed, or you can use "OTHER" to order non US sizes. To figure out what size you need, use a ruler or caliper to measure the diameter (in MM) of your coin, then order the next smaller MM size for a comfortable fit, the foam inserts expand enough to hold the coin tight in the snaplock.
***All puzzles already come in a snaplock case, please only order an extra if you plan to open and close your puzzle often or need them for coins you already have and need to protect.