Ciabatta is somewhat elongated, broad, and flat, and is baked in many variations, although unique for its alveolar holes. Ciabatta is made with a strong flour and uses a very high hydration dough.While panino indicates any kind of sandwich regardless of the bread used (whether slices or a bun), a toasted sandwich made from small loaves of ciabatta are known as panini (plural of panino) outside Italy.