The 34B Model - Choosing your model 
 
The bra size 34B / 75B / 90B has been the standard model size for many decades. Although it probably represented the average western figure type in the 1960’s it has become increasingly difficult to find a model this size. For example an average UK bra size is now 36D. Despite its rarity, the industry has continued to focus on this size as a first sampling specification. This article describes the commercial size of a 34B.