I believe it's finger bowl c. 1930's - 4.1/2" in diameter and 2.1/2" in height. Very good quality, thin glass and has a 'ding' to die for - has a high quality ground/polished pontil depression in the centre of the base, in which (in upper case) is a backstamp reading MADE IN ENGLAND, and the cutting runs into the pontil area. This bowl has a slightly outward curving/flared rim. The woman from whom I purchased this, has some considerable knowledge re glass (at least I think so) and told me it was Webb Corbett. Unfortunately, regret that I cannot prove this to you though.