Cappelleti are similar to, and often confused with, tortellini, another northern Italian filled pasta. Both are generally made with a meat and cheese filling (although sometimes it's just cheese) and are usually served in chicken broth, often on New Year's Day or as part of a large Christmas feast or other special celebration. Nowadays they are a typical Christmas dish throughout central Italy.
The difference between the two noodles is the size (Tortellini tend to be smaller, about marble sized Cappelletti are usually slightly larger) and in the fold. A cap resembles a stylish, pointed hat with a round, upturned (sometimes curled) brim, while the Tortellino looks more like the commonly shaped Chinese wonton dumpling with “flower buds”. Cappelletti are also similar in shape to the so-called Russian dumplings Pelmenihowever, these are larger and have different fillings.