Keeps mud out, keeps floors clean. Cleans boot and shoe soles and sides. Heavy Duty, durable tough design can take abuse. Just add water and step in. Good for all seasons, snow, cold and rain water. Cleans all shoe and boot sizes, even cleans monster size boots. Stiff bottom prongs clean tough, deep sole treads and lugs. Contoured side brushes and front scraper bar make for easy scraping and cleanup. Dump out dirty water when finished. Water fill level tells you how much water to add. Can also use with mild soap or disinfectant. Good for garden, house, construction, factory, garage, barn, or cottage. Size is plenty big to fit any size boot: 24 x 14 x 2 inches.