My chest measures 33.5 with a push-up bra and a thin blouse. When I put on the size small, it was snug around the chest.  I ordered the small because I wanted black.  I wanted to love it, but I think that the double breasted style is the problem in design.  The outside zipper pockets are too close to the armhole to be used by the same side arm.  I am sending it back. I am not sure if a medium or a larger size will solve the problem.  I purchased this to hold my tech going through the airport and boarding the plane, not to walk around with it loaded.  I thought about moving the buttons, but was afraid that the fabric would show damage where they were removed.  It is unfortunate that Scottevest is not in stores. I live in NYC, this is a big enough market for at least one store to have the franchise.  I am reluctant to order another one, both because the black is not available in med or large and because, like other reviewers, I am not sure it will work. The price is right.