This is a very old item and I cannot say I have ever seen a piece like this as it looks to have cross stitch in under the glass  and it is a beautiful and well done brass setting and it still has glass intact and the glass has a curve to it. The piece may have had stones at one point and it is needing a chain but it is a very nice piece worthy of using. The piece is about 1 1/2 inches wide and about 2 1/4 inches tall.