Got tired of the hair brushes taking up room on the sink so I designed this to hold them on the side. It takes 2 screws, one on the bottom on the inside. The top tab will break if you don't use the bottom screw if someone bends it accidentally. Worked out good. The brushes are a snug fit. Scale it for bigger brushes.
I added another one to hold a brush that's 2.25" dia. Scaling made the rest of ot grow too much.
Prints without support standing up. Use two #8 flat head wood screws for mounting. Use needle nose pliers to hold the screw in the bottom hole while you start it and use the hole in the side of the bottom for the screwdriver. Hole centers are 5 in. apart.