One Size Fits All - Easy to open, Easy to Install in seconds with no tools , Easy to Clean with water and soap. Fits most standard popular sizes such as Ball, Cove, Tylo , Brandywine types of door knob. Comfortable, Soft Anti-Slip with Maximum Grip! -The best simple, functional and effective solution that serves a great need. It's perfect for everyone, whether you have arthritis , finger pain, and house full of kids , or just always have hands full Enjoy Cover is ergonomically designed with ribs which allows anyone to open the door easily! Great for the elderly who struggle to turn around door knobs and kids always finding hard to turn slippery doorknob Made of premium grade 100 percent Silicone, Nontoxic, BPA free, Allergy Free, Strong and durable. Meeting all safety standards and providing the utmost best and safest quality product to our customers. Satisfaction Guaranteed or full money back. We love our customers! If you are unhappy with our product simply let us know and we will take care of the rest! We are committed to provide the best customer service. Designed in the USA, Patented: US D917,261 S Less Cold and Less Hot to the touch - No more burning when touching outdoor door knobs. Withstands extreme hot and cold temperatures. Stretch to install by hand only. Do not use any sharp tools to install which may damage the product. Decorative, bring color to life! Personalize your room with various colors soon available