Capellini are typical of the areas surrounding Genoa, Rome (Ciociaria) and Naples. This is thin rod shaped pasta; it is between 0.033 " – 0.036" thick.
Very simple sauces suit this kind of pasta: butter and cheese, or melted butter with cheese and sage. Other perfect matches are egg-based sauces or fresh tomato -based sauces. They are delicious in a light broth. In the Naples area they are also used for oven pies.