Ziti are extruded pasta tubes sized smaller than rigatoni but larger than mezzani. Ziti may have smooth sides, but the addition of the word rigati (meaning "ridged") denotes lines or ridges on the pasta's outer surface. Ziti is similar to penne, but often has ends cut in a straight line versus diagonally. Ziti in the US is most commonly associated with the Italian-American dish of baked ziti.
Ziti is the plural form of zito, Regional Italian for "bridegroom".