24" (610mm) - 30 lbs. 30" (762mm) - 37.5 lbs. 36" (914mm) - 45 lbs. 42" (1067mm) - 52.5 lbs. In a nutshell, floating shelves are just what you need if you're aiming to make the most out of your space, give your place a visual upgrade, and have a hassle-free yet versatile storage option.