For years I have been frustrated that coin albums will not usually accommodate coins in Kointains holders. This is the best way I know to prevent slide lines and damage to coins that might accidentally fall out when others are inserted. Dansco millimeter pages allow this. 28mm works well with small dollars and loonies. 40mm fits Canadian 36mm silver dollars and US silver dollars in Kointains. 32mm pages will fit Canadian 50 Cents and--although it can be tricky, US hal dollars in Kointains. I am pleased with this purchase.