I was told, just in case you have to get up and walk around, it would be helpful, since the hospital gowns don't cover everything. Despite the fact I feel I have a cute butt, that I'm sure would not offend, I bought a robe.
Right to Walmart, where I find one of the only two they have. Best part, both were the same and even better, "One Size Fits All". Let me say that the one size may fit all, but it will look far different of each person wearing. PS: I didn't take it out of the bag at the hospital!