Each Lighthouse round 18mm inner dimension coin capsule can store, protect, and display one coin, round, charm, or medallion with a diameter of 18 millimeters. Inert, acid-free, and safe for long term storage - will not damage your coins. Box of 100 round coin holders. Use this size for US Dimes.
All Lighthouse round direct fit coin capsules have an outer diameter that's 6mm bigger than the inner diameter.
The can accomodate coins up to about 3mm thick.