Individuals Reference Sex Width Notes ElSayed2016 male 15 Naderloo2010 male 12.3 Shih2022 male 15.3 Shih2022 male 15.2 Shih2022 female 9.7 Shih2022 female 11.8 Shih2022 male 11.8 Shih2022 male 17.2 Kumar2019 female 13 Kumar2019 female 15 Ranges Reference Sex n Min Max Notes ElSayed2016 non-specified 2 1.28 1.4 ElSayed2016 non-specified 7 10 23 ElSayed2016 male 6 10 14.2 Shih2022 male 3 10.4 12.1 Kumar2019 male 4 14 18 Kumar2019 female 3 11 12 Kumar2019 male 9 11 19