The opening is round and has glass. Measurements are: 8" by 6" and the round opening is 3 1/2 diameter. The item "Antique 19th Century French Cast Iron Bow Top Photo Frame" is in sale since Saturday, January 19, 2019.This item is in the category "Antiques\Decorative Arts\Picture Frames". The seller is "julietjonesvintage" and is located in Palm Harbor, Florida. This item can be shipped worldwide.