Old Order Amish women and girls wear modest dresses made from solid-colored fabric with long sleeves and a full skirt (not shorter than half-way between knee and floor). These dresses are covered with a cape and apron and are fastened with straight pins or snaps. They never cut their hair, which they wear in a bun on the back of the head. On their heads they wear a white prayer covering if they are married and a black one if they are single. Amish women do not wear jewelry.

Men and boys wear dark-colored suits, straight-cut coats without lapels, broadfall trousers, suspenders, solid-colored shirts, black socks and shoes, and black or straw broad-brimmed hats. Their shirts fasten with conventional buttons, but their suit coats and vests fasten with hooks and eyes. They do not have mustaches, but they grow beards after they marry.

The Amish feel these distinctive clothes encourage humility and separation from the world. Their clothing is not a costume; it is an expression of their faith.