The Tanach seems to make a big deal out of the beauty of certain women, including Sarah, Rebecca, Rachel, and Esther, but no mention of is made regarding Ruth's appearance. This seems particularly odd in a "love story" of sorts. Was Ruth beautiful, and why is that detail relevant to other narratives but not to this one?
The question is whether Rus was beautiful. The Alshich and ibn Ezra say she was at least to the people around her. But that may not mean she was an all time beauty.