I had the 2 and 4 delivered. The 4 seemed to be a bit longer and seemed a lot larger than the 2. I could tell by the inside that the 2 had been washed many more times and the 4 seemed new, so it is possible that the 2 had shrunk some since the 4 seemed much bigger. I thought the color was beautiful and it was very comfortable. If you are a full c cup or larger you will probably find the top too small in the 2. It fit me fine but I am kind of between a b and c.