Individuals Reference Sex Width Notes Crane1975 female 15 Crane1975 male 16 Crane1975 male 24 ElSayed2016 male 17.5 ElSayed2016 male 22 ElSayed2016 male 14 ElSayed2016 male 23 ElSayed2016 female 11 Rosenberg2000 male 19.25 Rosenberg2000 male 22.35 Rosenberg2000 male 23.7 Rosenberg2000 male 14.6 Shih2019 male 19.9 Vannini1981 male 26.7 Poupin2018 male 20.2 Poupin2018 female 10.7 Poupin2018 male 14 Poupin2018 male 13.4 Poupin2018 male 12.2 Poupin2018 male 10.3 Poupin2018 male 14.7 Shih2022 male 17.4 Shih2022 female 18.1 Shih2022 male 19.9 Shih2022 male 18.7 Ranges Reference Sex n Min Max Notes ElSayed2016 male 3 10 13 Poupin2018 male 5 11.6 18.2 Poupin2018 male 9 11 22.9 Poupin2018 female 6 8.5 17 Shih2022 male 4 16.5 19.9 Kumar2019 female 9 11 22 Kumar2019 male 7 18 31 Kumar2019 female 6 14 21 Kumar2019 male 8 18 31 Means Reference Sex n Mean Notes Richmond1997 non-specified 1 18 rough values