This 4 piece set includes frames measuring: 4 x 5.25 with an interior measurement of 3.5 x 4.75, 3.25 x 4.5 with an interior measurement of 2.75 x 4, 2.5 x 3.75 with an interior measurement of 2 x 3.25, and 1.75 x 3 with an interior measurement of 1.25 x 2.5. All approximate measurements are in inches.