This desk pad calendar insert is 24. 5" x 16". It is designed to fit in the following Dacasso side-rail desk pads: P1002, P3002, P3202, P3402 and P7002. The calendar insert has an individual sheet for each month with all the major holidays labelled. A note section is included on each sheet as well. Extra space is provided on both sides to allow the insert to be tucked beneath the side rails securely.