Our wide cone shades are made from good quality white card that makes them self supporting.
They have a wire frame that sits at the bottom of the shade, with a second, same sized wire rectangle fitted to the top.
The shade ring - or 'gimble' - that fits the shade to your lamp base, is fixed around 4 to 6cm up from the bottom (depending on size) and is supplied with a reducer ring, as shown, that can be removed to ensure a universal fit.