New Chain Hooks For Window Displays. This is a new package of chain hooks. There are 100 hooks in a package. These can be used with suctions cups to keep chains neatly together. These can also be used with suctions cups to hang jewelry and gift items in a window display or any glass or mirrored surface. Each hook measures approximately 2 5/8" x 1 1/2" (66 x 38 mm).