Sizing - it's not you, they ARE getting smaller.
We have seen a lot of fluctuation in sizes between brands and suppliers, and we are looking for ways to ensure that you will get a consistent experience when you order from us. It's very important that you do look at the size charts where available, and when in doubt, order up a size or two.
As a general rule, any one of our "womens" cuts will tend to be smaller and more closely fitted. If you prefer your shirts with some room in them, try a "unisex" or "mens" version. These will be more open in fit and will run truer to size.
The definitive answer should come from a sizing chart, but when in doubt, feel free to email us before ordering, and we can give you guidance.