All three spaces had 36 inches of available space and these seemed a perfect product so that the rail can go higher, lifting the clothes from the lower rail of clothes. Also, I have ordered an athletic brace because, although these shoes are very supportive, my problem arch needs even more. I purchased them for a sci fi convention where Id be on my feet all day, and I didnt have time to take them for a test drive before the event. My biggest concern comes from the fact that my sandals have completely destroyed themselves in less than a few weeks after receiving them. I didn?t want to spend a ton. My husband had a chair that we just threw clothes on that he might wear again like a pair of sweat pants or shorts that he sleeps in. Happy customer here At least it didnt say opening instructions inside - yes I have seen that from a major computer company. And the fabric has stretched to the point that they complete fall off my feet with every step. These Vionic slippers supported my feet very well and I had less heel pain while wearing these around the house.