Dimensions are laid out as follows Base x Top x Slope.
5 ½" Bongo - 5 ½ x 4 ¼ x 6 ¼, 7" Bongo - 7 x 6 x 6 ½, 8" Bongo - 8 x 7 x 7 ½, 10" Bongo - 10 x 8 x 9, 11" Bongo - 11 x 9 x 10, 12" Bongo - 12 x 11 x 11, 13" Bongo - 13 x 11 x 11 ½, 14" Bongo - 14 x 11 ½ x 12 ½, 15" Bongo - 15 x 13 x 14, 16" Bongo - 16 x 13 x 14, 17" Bongo - 17 x 14 x 15 ¼, 18" Bongo - 18 x 15 x 16