Butterflies are generally brightly colored, with many stripes on their bodies, rich colors, and various patterns on their wings and bodies. The largest butterfly has a wingspan of about 28 to 30 centimeters, and the smallest only has a wingspan of about 0.7 centimeters. The main difference between butterflies and moths is that butterflies have a pair of club-shaped or hammer-shaped antennae on their heads, while moths' antennae come in various shapes.