These jeans don't fit me anymore.
fitting
/ˈfi-tiŋ/
adjective
of a kind appropriate to the situation : suitable
noun
an action or act of one that fits; specifically : a trying on of clothes which are in the process of being made or altered
something used in fitting up : accessory
a small often standardized part
verb
to conform correctly to the shape or size of
to insert or adjust until correctly in place
to make or adjust to the right shape and size