This antique darkroom condenser is 10'' x 10'' the circle opening is 7 1/2''. The glass is in a black wooden case that is taped closed. it has hinges on one side and two latches on the other. Both sides of the case where the glass is exposed is black metal. There is tape on the top with some information written by the previous owner. This can be easily removed. The glass has no cracks or chips and appears to be in excellent condition.