This could be legs, i.e. for stockings, feet, i.e. for shoes, hands i.e. for jewelery. I know a female leg model, a male hair model, a female foot model and a hand model. Almost any part of the body has the relevant specialists that are experts in making that small part of the body look as ‘perfect’ as possible. It can be very interesting if you can cope with the conversations you will inevitably have with new acquaintances who are confused about exactly what foot modeling is!