Uramaki (, "inside-out roll") is a medium-sized cylindrical piece with two or more fillings, and was developed as a result of the creation of the California roll, as a method originally meant to hide the nori. "Uramaki" differs from other "makimono" because the rice is on the outside and the "nori" inside. The filling is in the center surrounded by "nori", then a layer of rice, and optionally an outer coating of some other ingredients such as roe or toasted sesame seeds. It can be made with different fillings, such as tuna, crab meat, avocado, mayonnaise, cucumber or carrots.