What is the best way to store assorted unused clothes hangers?
I just leave mine in the packaging in which they come from the shop, hung at one end of the closet or other. The hangers I normally by come in packs of 8-12 held together by a cardboard sleeve which prevents the slipping and getting tangled up. You could emulate this easily enough by holding bundles of a similar size together and wrapping a small amount of (not too sticky) tape around them, and then you can just hang them at the end of a rail confident that they won’t get tangled up or take up more space than they really need to.