Old bistro glasses with thick bottoms

Set of four antique small French bistro glasses. These glasses are sometimes called "deceptive" because they have a very thick base and the glass holds less than one might think. They are also referred to as "trou normand" glasses. They are made of thick glass and have been handcrafted, with a base as thick as that of absinthe glasses. 📏 Height 10.2 cm. Diameter at the top of the glass 5.5 cm. Weight of the set 680g. They are all in good condition with no chips and slight signs of use.