Model-sized is an adjective used to describe a person who is very thin and has the physique of a runway model. However, using the same word repeatedly in writing can become monotonous and boring. Therefore, it's always a good idea to have some synonyms on hand to add variety and interest. Some other words that can be used instead of model-sized are slim, slender, svelte, petite, skinny, and lean. These words keep the same connotation as model-sized but offer some diversity in language and help to create a more engaging content. It is important to use words that convey the intended message without being offensive or judgmental.