Ring sizes:
Ring 30cm - B.Dia.30 x H21cm x T. Dia.25cm

The lampshades are measured in cm diameter- this is the full measurement across the lampshade. The lampshades comes with a standard 40 mm european fitting and also a plastic 25 mm converter.
 
Shade Fitting Options:
Lamp fitting, located at the bottom of the shade.
Ceiling fitting, located at the top of the shade.
Duplex fitting, full adjustable for both lamp and ceiling position.
 
Shade Body:
Lampshades are lined with extra ridged 390 micron thick, High impact strength with Excellent Tear resistance, Anti-static treated to minimise attraction of dust, UV Stabilised with Anti Yelleowing Technology. Flame retardent PVC which has passed glow wiretests carried out by the lighting association.
 
Safety:
Low energy light bulbs are recommended (40 watts or less)