Nail polish rack
As pictured, its 2 x 4, but can be made to your dimensions. Please contact us with your dimensions and requirements before purchasing if not a size
A personal favourite from my Etsy shop https://www.etsy.com/uk/listing/288103673/nail-polish-rack-for-opi-cnd-gelish-orly
DIY Project: Magnetic Nail Art Organizer | Chalkboard Nails | Nail Art Blog
Nail polish organizer
My creative Ikea "Nail Polish" rack. This is much prettier than your typical polish rack options. These are Photo Shelves in two different sizes strategically placed. www.bamboospalkn.com
L-brackets from Home Depot. Might need to run a line of hot glue or something on the front edge to create a lip.
shutter turned magazine holder- could also be used to hold recipes in the kitchen or mail that needs sorted