This tapered drum shade has been covered with natural linen fabric, this creates a warm, inviting ambience in your home when the light shines through. All sizes should be used with a max 42W bulb. Additional Measurements: Bottom Dia. 20cm - H15 x Top Dia. 11.5cm Bottom Dia. 25cm - H18 x Top Dia. 14.5cm Bottom Dia. 30cm - H22 x Top Dia. 17.5cm Bottom Dia. 35cm - H26 x Top Dia. 20cm Bottom Dia. 40cm - H29.5 x Top Dia. 23cm