No, not all pots have the same size lid. Pots come in various shapes and sizes, and their corresponding lids are designed to fit the specific dimensions of each pot. Lids are typically manufactured to fit their corresponding pots snugly to prevent heat and moisture from escaping during cooking. Therefore, the lid of one pot may not fit properly on another pot if their sizes are different. It's important to use the correct lid that matches the size and shape of the pot you are using.