I bought this after my child locked themselves in a rental apartment by turning the doorknob. Made of silicone, it should fit most doorknob sizes. It comes with 4 pieces, and I used one. The other 3 are new and unused. *Will ship compactly.* Please feel free to ask any questions. Color: Light Blue ~~~~~~~~~~~~~~~~~~~~~~ Please only purchase if you understand that this is a used item. Please refrain from purchasing if you are sensitive to used items. *I'm sorry, but I generally do not accept returns.* *Packaging materials may be reused, please understand.* *Due to the seller's circumstances, the shipping method may be changed from Mercari delivery to Yu-Yu Mercari delivery at the time of shipment.*