Dimension : Small dog potty tray (23''×16”) for small dogs and puppy (<10 lbs) like Yorkshire Terrier, Chihuahua. Please refer to the size chart to choose suitable one for your dog. Small dog litter box for dogs weight 3-10lbs, Large for 10-60lbs, Extra large for 60-100lbs. Machine Washable & Ultra-Absorbent Artificial Grass & Odor Free : The upgraded dog potty grass pad is ultra-absorbent and odor free. The knitted and melted bottom permit urine to instantly flow into the plastic tray below and reduce urine stink. Reusable & Washable Pee Pads : Machine washable. It is ultra-absorbent, leak-proof. 4 LAYER SYSTEM : a)Top -- breathable mesh print; b)Middle –Super absorbent cotton; c) Middle -- TPU inner layer protects against urine leakage; d) Bottom -- Cloth with non-slip particle. Dog Potty Training : Ideal for indoor where your dog cannot be allowed to go out owing to illness or bad weather. Also an ideal training tool for disabled dogs and elderly dogs. At the beginning, you can leave some urine on the grass try to attract their attention. Easy of Cleaning : Machine washable. Please soak the soft and realistic grass pad in soapy water for a while before rinsing, which could get rid of the pee and stink mostly. Package List : a)grass pad : 1pcs b)plastic tray : 1pcs c)washable pee pad : 1pcs