Protruding far from the perforated wall. I use mine on the inside of a closet door so I need my items on the perforated panel to be close to the perforated panel so I can close my doors properly. Any extra, unused space is space that I could use for storage in my closet. I deduct 1 star for that. The cups are smaller than I expected but it works for me as mine are meant to be used in a cupboard. You seem comfortable. I hope this and my picture will be useful to you. You can see in my photo how far they stick out of the perforated board and that one of them can hold a bottle of craft glue and the one behind mini and long hot glue sticks. Mini sticks of hot glue fit on the top of the mug. I hope I was helpful in giving you an idea of the size.
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