A crinoline is a stiff or structured petticoat designed to hold out a skirt, popular at various times since the mid-19th century. Originally, crinoline described a stiff fabric made of horsehair ("crin") and cotton or linen which was used to make underskirts and as a dress lining. The term crin or crinoline continues to be applied to a nylon stiffening tape used for interfacing and lining hemlines in the 21st century.

A ball gown, ballgown or gown is a type of evening gown worn to a ball or a formal event. Most versions are cut off the shoulder with a low décolletage, exposed arms, and long bouffant styled skirts. Such gowns are typically worn with an opera-length white gloves, vintage jewelry or couture, and a stole, cape, or cloak in lieu of a coat. Where "state decorations" are to be worn, they are on a bow pinned to the chest, and married women wear a tiara if they have one. Although synthetic fabrics are now sometimes used, the most common fabrics are satin, silk, taffeta and velvet with trimmings of lace, pearls, sequins, embroidery, ruffles, ribbons, rosettes and ruching.