This is a set of 2 porcelain lampshades made for wall sconce/hanging lights. They feature renaissance style art, gold trim and the stickers from Century Sales, a Montreal based company. They are somewhat worn in a way befitting their style and age.
They each measure 6 1/2 inches in height and 6 3/8 inches across at the fitter opening.
Note that there are 3 holes for screws placed in a triangular formation at the top and a drain hole at the bottom (image #5).