Some chap called Prendergass has done all the measuring for us.
A 1996 study by Pendergrass et al., using
vinyl polysiloxane castings taken from the vaginas of 39
Caucasian women, found the following ranges of dimensions:
[3]
- lengths (measured using rods): 6.9 to 15 cm (2.7 to 5.9 in);
- widths: 4.8 to 6.3 cm (1.9 to 2.5 in);
- introital diameters: 2.4 to 6.5 cm (0.94 to 2.56 in)
A second study by the same group showed significant variations in size and shape between the vaginas of women of different ethnic groups.
[4] Both studies showed a wide range of vaginal shapes, described by the researchers as "Parallel sided, conical, heart, [...] slug"
[3] and "pumpkin seed"
[4] shapes. Barnhart et al., however, weren't find any correlation amongst the race and the size of vagina. They were also unable to characterize the vaginal shape as a "heart, slug, pumpkin seed or parallel sides" as suggested by the previous studies.
[1][5] A 2003 study by the group of Pendergrass et al. also using castings as a measurement method, measured vaginal surface areas ranging from 66 to 107 cm2 (10.2 to 16.6 sq in) with a mean of 87 cm2 (13.5 sq in) and a standard deviation of 7.8 cm2 (1.21 sq in)
[6]
Wikipedia.