Cat Throne and Purrzum Shirts

I received the Purrzum shirt for Christmas in a size Small. I'm petite and only 5' and usually wear a small or XS in most clothing brands, but when I received this, it was really tight. I could wear it, but it wasn't comfortable. Finally we got an exchange and I got a medium. It fits a lot better, but still isn't quite how these types of shirts usually fit on me. The neck also seemed a big high. I really like the company and designs, all I can say is that maybe it would be nice if they had a different style of shirt with a slightly more scoop neck and one that doesn't come up as high/tight on the neck, and maybe got some that are slightly looser to be more true to size. These are extremely fitted.