18" diameter I think this can be adapted to either a lamp or hanging light. We planned to use it on a floor lamp, but then found another one with colors more suitable for our decor. One section is cracked and has been glued nicely with clear glue. We didn't think it showed enough to be a problem, especially if turned away from view. But I assume it can be replaced also. When light shines through, the dark sections glow dark amber. Location: North Olathe it's NOT ok to contact this poster with services or other commercial interests kansas