Ordered this item based on daughter's measurements, but was unable to get the top on.  Waist is tapered to fit a woman's shape, but no "give" in the fabric to accommodate a swimmer's shoulders.  My daughter wears a size 28 technical suit so I ordered her a size small.  We could not get the shirt on so we ordered the next size  - medium.  Was finally able to put the shirt on, but it took 2 people to do this.  I would compare it to putting on the "old" full body suits when wet.  Tried to contact 2XU for help, but they are not based in the USA and had horrible response from them.  Finally found a store in the northeast that carried the product and the store clerk suggested going to a men's size since the waist was a little wider.  The size small in mens was a little easier to put on, but still needed two people.  I have ordered additional sizes to see if any fit better.