The Fog Blue Box Pleat Lampshade is a great classical addition to any room. The Measurements are as follow 10" is 6" Top X 10" Base X 8" Height 12" is 7" Top X 12 Base X 8" Height 14" is 9" Top X 14" Base X 8" Height 16" is 10" Top X 16" Base X 10.5" Height 18" is 11" Top X 18" Base X 12" height