Every lens holder is 24mm — designed to fit any contact lens on the market. Monthly, biweekly, toric, colored, multifocal — they all fit perfectly. The ultrasonic cleaning is gentle enough that it won't damage, warp, or scratch even the thinnest lenses. In fact, it's the opposite — by removing deposits without physical rubbing, PureLens is the best way to extend the life of your contacts. Your lenses last longer because they're actually clean. Not surface-clean. Actually clean.