I made this model because we bought a new home, with no shower shelves, or any room for towel hooks. I hate the suction cup ones and all of the other models I searched for didn't fit the 1" thick metal piece our shower has on top of the glass. I made them 2 sided to also hold our shower scrubbers or even one of those hanging shelves. I added a spot to add 6mm x 2mm non-slip rubber dots to either side of the hooks, so the plastic doesn't rub the glass. We've been using them or months with 0 issues with and without the rubber dots. They are deffinitely optional.

They measure about 7.5" long x 5.3" rom hook to hook x 1.4" thick