How to measure a lampshade
Before you do anything else, we recommend finding a tape measure and learning how to figure out the size of any lampshade. Too small and you can leave your table lamp or floor lamp looking bottom-heavy. Too big and you’re left with an unbalanced piece that looks ‘off’. As a rule of thumb, it’s best to go for the largest shade your space will allow as the larger the shade, the more light is distributed. This can help to add an illusion of space in smaller rooms.
To accurately size up a shade, measure across the diameter at its widest point (this tends to be at the bottom of the shade). Next, measure the total height of your shade. Make a note of both measurements and keep them to hand.