- 24 mm (~0.75 in) diameter - holds up to 120 sheets
- 32 mm (~1.25 in) diameter - holds up to 140 sheets
- 38 mm (~1.5 in) diameter - holds up to 160 sheets
- 8 discs - enough for Pocket, HP Mini, or Half Letter
- 11 discs - enough for all sizes, including US Letter (Happy Planner Big)
Compatible with Levenger Circa, The Happy Planner, Office Depot/Office Max TUL, Stapes Arc, and Martha Stewart systems.
* Pictured size is 24 mm. Accessories (covers, inserts) are not included. Please see our selection of covers for discbound planners here.