Beauty is distinct from clothing and makeup. Such things can enhance beauty, but not remove or excuse faults.
Beauty standards are unchanging and known by everyone. They are seen as natural law, unchanging and not societally imposed.
Beauty standards specify the general proportions that are most desirable for various heights and body types, and include many traits that are listed as faults. There is such thing as a flawlessly beautiful person -- indeed many, depending on height and body type.
There is still scope for changing fashions in among all this. For example, hair colour is not specified except that striation is a serious fault.
If you think all this removes a lot of the romance, you're right. You could follow a checklist to find a husband society would consider perfect, and indeed many women do use exactly that. You can buy them from any bookshop. Lots of different versions of them. (Guides marketed at the more romantic, peer-group-driven, less proactive male population don't sell as well.)