Shade Dimension Top diameter: 6.3 inch , bottom diameter: 13.4 inch, height: 8.5 inch, screw thread diameter: 0.43 inch. Medium size suits most table lamps and floor lamps. Please check the shade size carefully to make sure they are suitable for your light fixtures before purchasing. Easy to Install Our linen shades are folded to protect them during shipping. Installation is a breeze - Only need to assemble the upper and lower hoops. Natural Material Our lampshades are handmade using burlap, an environmentally friendly and healthy material.