Over the door width needs to be less than 1.5” to fit good.

Like this over the door bathroom holder. I have this in our RV so things wouldn’t be left on the floor and it’s all within reach and out of the way. Only problem is our shower door is exactly 2” wide and this doesn’t completely fit on the door. But it’s snug enough to not move and we like the towel holder for the other side.

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