Overall style defines the "feel" of the site.

High Fashion. Often black tone, often brown/gold. Spare, sharp, blocky structure. Large images or video .
Retro. Styles similar to those of the 1940's to 1960's
Antique. The style of Trader Joe's catalogs. Uses parchment browns, wood cut images, occasional graphic embellishments, and distinctive antique fonts.
Vintage. An "old" look with no definite period or style, but more like Victorian than Antique.
Victorian. White-tone sites with frequent use of floral themes, particularly roses, and images of lace.
Easter Candy. Pastel colors, particularly chocolate brown, sea-foam greens, pastel blue, pink. A flat, rounded look, often with wide borders or polka dots.
Bubble Gum. The dominant feature is pink.
Character. Major design element is flat, cartoonish characters.
Girly. Feminine colors with a playful, adolescent feel.
Juicy. From Juicy Couture. Signature is Pink with black curly graphics and crests.
[Baby]. A feminine style with childish graphics. Pastel colors dominate.
Street. High-contrast pallet, freeform structure, graphics are paint-drip splatter, "dry-brush" painting, or graffiti.

Less Common Styles

[Rustic]. Country, Southwest or Western. Often uses images of distress, unpainted wood, ropes, brands, etc.
[Gothic]. Gloomy, high contrast pallet or block, white, red and maroon.
Candy Pop. Clean psychedelic rainbow ribbons, solid areas of color, bubbles, parallel stripes.

What to Do with ...

There are some styles that overlap significantly with other styles, and are hard to classify, like:

Note that this lists is not a catalog of all possible web designs; it only considers the styles that are common among fashion and apparel websites.