Is it just me, or are the hairpin and W types identical?
The hairpin refers to the presence of a visible clitoris as the hairpin shape. The middle ridge of the hairpin type comes up further.
Standard Type (+V)Double sphere type (ω-type)Π-TypeVestige TypeParabola TypeCatenary TypeΨ-TypeHairpin TypeLowleg TypeϤ-TypeLightning Rod TypeW-TypeSuper-acute angle Type) | ( TypeTapering typeStandard Type (Big)