Circle frame outside 1.875 x 1.875 inside 1.375 x 1.375, rectangle frame outside 2.25 x 1.75 inside 1.75 x 1.25, oval frame outside 2.25 x 1.75 inside 1.75 x 1.25, square frame outside 1.675 x 1.675 inside 1.125 x 1.125. All approximate measurements are in inches.
