The fitting is available in a range of diameters and colours. The standard one is stainless steel and about 10 inches in diameter.
The image shown is with a 60W clear light bulb, you will get a different effect with a low energy lightbulb.
Our Colander lampshade is supplied with a 6″ pendant set (although almost certainly the one you have installed will be OK to use).
Please text 0044 7971428715 if you are interested