Simple hook I needed for hanging a laundry bag on a wire shelf.  This specific shelf has horizontal rods of 6.6 mm diameter with the vertrical gap between the rods being 26 mm (see CAD sketch)

Modeled in OnShape:  https://cad.onshape.com/documents/8e8524b427ecdf87347465c0/w/9a673d354d5e51ac3efbfdce/e/f7920f2793b0ecaf0a0ab541?renderMode=0&uiState=66414d33b89c4b04e2454e2a