If you take pills twice a day you can now be organized for an entire month! 31 AM and 31 PM numbered compartments that can be counted down corresponding to the day of the month There are 2 extra compartments for storage of additional or occasional medications You receive 2 units - one is labeled with AM and PM for days 1 - 16 and the second unit is labeled with AM and PM for days 17 - 31 and contains 2 compartments labeled for EXTRA medications Each unit size: 11" x 3.5" x 1" Individual Compartment Size: 1.25" x 0.5" x 1" If you take pills twice a day you can now be organized for an entire month! This pill organizer set is labeled with 31 AM and 31 PM compartments that can be counted down corresponding to the day of the month. There are 2 extra compartments for storage of additional or occasional medications. You receive 2 units - one is labeled with AM and PM for days 1 - 16 and the second unit is labeled with AM and PM for days 17 - 31 and contains 2 compartments labeled for EXTRA medications.