A ‘belt' that wraps around the waist, & has clasps that attach to stockings to hold them up. These are not panties, but rather worn over panties. Often purchased along with a bra & panties to make a pretty set. Don't forget the stockings
belt worn around the waist with straps, called garters, that clip onto stocking tops to stop them falling down. Usually the back of the garter is adjustable to fit different waist sizes and the straps can be adjusted for length.
A strap hanging from a garter belt or bustier to support stockings (not pantyhose)..