The rings that have given the names to our Columbus photo alubms. The photo albums comes as a standard with 20 mm rings and 20 photo papers. If you want to fill the albums with more papers you can buy wider rings. With our larger Columbus rings (up to 50 mm) they can hold up to 80 mounted photo papers or 120 photo papsers if used as for example a guest book.
25 mm ring = max 40 sheets (approx. 30 sheets mounted photos)
32 mm ring = max 60 sheets (approx. 45 sheets mounted photos)
38 mm ring = max 80 sheets (approx. 60 sheets mounted photos)
50 mm ring = max 120 sheets (approx. 80 sheets mounted photos)