These Chakan Coin images are around 1.5" wide, which is 38.1mm wide. Therefore 30mm is too small for the cases. From what I gather, you actually need 40mm coin protectors. Something like these 40mm cases should work: https://www.amazon.com/gp/product/B07CQQ4S81 Hope this helps! Also, big thank you to Chakan516 for making these.