The hemline is the line formed by the lower edge of a garment, such as a skirt, dress or coat, measured from the floor.

The hemline is perhaps the most variable style line in fashion, changing shape and ranging in height from hip-high to floor-length. What is a fashionable style and height of hemline has varied considerably throughout the years, and has also depended on a number of factors such as the age of the wearer, the occasion for which the garment is worn and the choice of the individual.

Similar to necklines and waistlines, hemlines can be grouped by their height and shape:

Dresses and skirts are also classified in terms of their length:

In the history of Western fashion, the ordinary public clothes of upper- and middle-class women varied only between floor-length and slightly above ankle-length for many centuries before World War I. Skirts of lower-calf or mid-calf length were associated with the practical working garments of lower-class or pioneer women, while even shorter skirt lengths were seen only in certain specialized and restricted contexts (e.g. sea-bathing costumes, or outfits worn by ballerinas on stage). It was not until the mid-1910s that hemlines began to rise significantly (with many variations in height thereafter). Skirts rose all the way from floor-length to near knee-length in little more than fifteen years (from late in the decade of the 1900s to the mid-1920s). From World War I to roughly 1970, a woman had to wear skirts near their currently-fashionable length or be considered almost hopelessly unstylish, but since the 1970s, women's options have widened, and there is no longer really only one single fashionable skirt-length at a time.

In the English language, black sheep is an idiom used to describe an odd or disreputable member of a group, especially within a family. The term has typically been given negative implications, implying waywardness. It derived from the atypical and unwanted presence of other black individuals in flocks of white sheep.

In psychology, the black sheep effect refers to the tendency of group members to judge likeable ingroup members more positively and deviant ingroup member more negatively than comparable outgroup members.

The term originated from the occasional black sheep which are born into a flock of white sheep due to a genetic process of recessive traits. Black wool was considered commercially undesirable because it could not be dyed. In 18th and 19th century England, the black color of the sheep was seen as the mark of the devil. In modern usage, the expression has lost some of its negative connotations, though the term is usually given to the member of a group who has certain characteristics or lack thereof deemed undesirable by that group.