Fit and flare in the context of "Evening gown"

An evening gown, evening dress or gown is a long dress usually worn at formal occasions. The drop ranges from ballerina (mid-calf to just above the ankles), tea (above the ankles), to full-length. Such gowns are typically worn with evening gloves. Evening gowns are usually made of luxurious fabrics such as chiffon, velvet, satin, or organza. Silk is a popular fibre for many evening gowns. Although the terms are used interchangeably, ball gowns and evening gowns differ in that a ball gown will always have a full skirt and a fitted bodice, while an evening gown can be any silhouette—sheath, mermaid, fit and flare, A-line, or trumpet-shaped—and may have straps, halters or even sleeves.