Rollabinder disks are available in a wide range of colours and in the following sizes.
Small = holds approx 1/4" (0.625cm)
Medium = holds approx 1/2" (1.25cm)
Large = 3/4" (1.875cm)
Jumbo = 1" (2.5cm)
The number of pages depends on the paper or card weight used. The above id for a guideline only.
TIP: Try binding a book using different coloured Rollabinders. This creates a colourful result.