The wedge hair style is a big, retro-style shorter layered bob, which was common in the 1970s for women with fine & straight hair. This look was made famous by Olympic Dorothy Hamill. Although short hedge hairstyles are not for everyone these haircuts are refreshing for many women.
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There are plenty of progressive layers, techniques for the stacking, short A-line or asymmetrical styles, choppy cuts, blunt or wispy bangs, tapered backs. All these are a typical wedge and can naturally increase the density of your cranium without too much weight!