Both the L and M sizes were used only once. They are in very good condition. Product Name: [New] Pigeon Nipple Protectors, 1 piece (with case) Sizes: L and M size set Purchase Date: April 2022 Condition: Opened Of the two nipple protectors included, only one was used, washed, and sterilized. The other one is unused. Packaging: The box may be folded for shipping. M size and L size are also sold separately, but it's a better deal to buy them together.