Given a reference text about spaghetti, what shape is it, where did it originate, and are there any variations of it?

Spaghetti is a long, thin, solid, cylindrical pasta.[1] It is a staple food of traditional Italian cuisine. Like other pasta, spaghetti is made of milled wheat, water, and sometimes enriched with vitamins and minerals. Italian spaghetti is typically made from durum-wheat semolina.[2] Usually the pasta is white because refined flour is used, but whole wheat flour may be added. Spaghettoni is a thicker form of spaghetti, while spaghettini is a thinner form. Capellini is a very thin spaghetti, sometimes known colloquially as "angel hair pasta".

The shape of spaghetti is long, thin, and cylindrical. It traditionally comes from Italy and has a two variations - those being Spaghettoni, which is thicker, and capellini, which is thiner and sometime called 'angel hair pasta'.