So far I?ve put my spare key, 2 candy bars & an 8oz bottle of water inside with room to spare. Low price for a gadget that assists user to be hands free when doing many tasks. They are quite wide so if you have a wide foot, these are for you. Good ?? Piece of crap fell apart after no time at all it?s very cheap Micro-usb sucks, USB-C is becoming more ubiqituous, and it doesnt care the orientation you plug it in. I really like this shelf. And also amazing customer service ! They were not dirty, but just a feeling and they don?t seem worth the money I paid. I turned around to see where it was coming from, because it didnt sound like it was from the earbuds at all.