The term FITTING MOST can be solved by the crossword solution UNISIZE, which is a seven-letter word. Unisize is an adjective used to describe clothing that is designed to fit most people, regardless of their size or shape. It is often used to refer to clothing that is made in one size and is intended to fit a wide range of body types. Unisize clothing is often made from stretchy materials such as spandex or lycra, which allow it to fit a variety of body shapes.