Measure the bottom dimension in the same way you have measured the top diameter do the same for the bottom diameter and write down your measurement.
Dimensions for lamp shades.
How to determine the correct lampshade size measure across the top of the lamp shade measure across the bottom of the lamp shade measure along the slant side of the lamp shade.
Allen roth 10 in x 15 in gray fabric drum lamp shade.
So a shade with the example measurements above would be referred to as a 16 shade.
Bottom diameter width of 10 to 11 inches.
So for a 6 inch lamp base the shade should be at.
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The shade should be twice as wide as the lamp base and one third of the total height of the lamp.
Bottom diameter width of 6 to 9 inches.
Extra large lamp shades.
First measure the base and height of your lamp.
The more styles of shades it can fit.
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The width across the bottom is what is referred to as the lampshade size.
The more basic shape of the body you have on your lamp.
Four measurements you ll need a top diameter b bottom diameter c vertical slant d vertical height.
Bottom diameter width of.
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Bottom diameter width of 6 inches or less.
Mini lamp shades.
Bottom diameter width of 13 to 15 inches.
The vertical height is approximately 1 less than the slant the shade is normally 40 of the total height of the lamp from the top of the slant to the bottom of the lamp.