Key characteristics include a stiff collar, full-length sleeves with buttoned cuffs, and a button-down front. They are commonly made from high-quality fabrics like cotton, twill, or poplin, which provide a smooth finish. The color palette is generally classic, with solid colors like white, light blue, and grey being the most common, along with subtle patterns like thin stripes or checks. When selecting a formal shirt, a proper fit is essential to achieve a sharp and professional look.