Simple coat hanger or towel hanger. Separate base and baseplate for more customization/ multiple colors. Snap together fitment that can be improved by glue. 

The model is quite small, the base being only an inch and a half wide. If you plan on hanging heaver items from it, I recommend printing at 150% scale or more, and the hook itself could be used with higher infill density. I printed at the raw size, and it can support two jackets, one of which is fairly heavy (pictured).