Flat rice noodles (with a shape similar to fettuccine) and rice vermicelli (with a shape similar to angel hair pasta) are popular types of Asian rice noodles (also called rice sticks) that are available in Asian markets and some supermarkets. They're made from rice flour and water, with the addition of tapioca or cornstarch to enhance their chewy texture and transparent appearance.
They come in wide (also called pad thai) and narrow thicknesses.
While both flat rice noodles and vermicelli are great choices for salads, stir-fries, and soups, they’re not cooked the same way. Rice vermicelli are best cooked by pouring boiling water over them and letting them soak until soft. The sturdier flat rice noodles are best cooked like pasta in boiling water.