A garment hanger and a sizer that can be removably mounted to the hanger are provided. The sizer includes a pair of inwardly extending fingers for mounting the sizer to a hook or a body of the hanger. The sizer can be manually or automatically removed from the sizer by a tool, by inserting the tool into a space between the hanger and a respective inwardly extending finger. The hanger and the sizer enable a method of reusing hangers and sizers, by automatically removing the sizers from the hangers, processing the removed hangers and sizers to provide reusable hangers and sizers. The reusable hangers and sizers are distributed to remote garment manufacturers for providing garment-on-hanger products.