That's right Carrusty............. I fitted them in my kitchen.
Any good glazing company can make them up. Remember to ask for "low iron" glass. It's rather more expensive, but it's clear, with none of the usual green tint you see on regular glass.
They'll polish the edges and drill holes for you as well.
Thank for your answers. I should have been clearer with the question. The Mrs wants white stained glass. We looked at some in John Lewis & it was £270-00 for a piece about a metre square...gulp. Anyway, shes done the research & got some for about £140-00...phew...