Levenger Circa Discs - Set of 22, 1-Inch, Black Large (ADS1850 BK) Set of 22 discs, enough for 2 letter-size notebooks or 2 junior-size notebooks plus 2 Circa Jotlet Translucent Notebooks Discs hold up to 150 sheets of paper Inner diameter of each disc is 1 inch&lt; Durable plastic