Garment Hanger Size Markers. We stock a variety of hanger size markers. Hanger sizer markers also called hanger markers or hanger sizers allows you to sort your hanging garments by size in your retail store. Hanger sizer markers easy slide onto the hooks of hangers, so you can change which hanger sizer marker are on your hangers as needed. If you cannot find the hanger sizer marker you are looking for please chat online or call and one of our knowledgeable representatives will assist you with our assortment of hanger size markers.