! Obstetric conjugate
| [[File:Low-dose_CT_of_obstetric_conjugate.jpg|120px]] <br>Median plane
| The narrowest bony points formed by the sacral promontory and pubic bone by the inner pubic archsymphysis.
| 10 to 12 cm.<ref name=Cetin2016/>
|-
! Sagittal pelvic outlet diameter
| [[File:Low-dose_CT_of_sagittal_pelvic_outlet_diameter.jpg|120px]]
| The narrowest bony points formed by the sacral promontory and the middle of the coccyx.<ref>{{cite book|isbn=978-0-443-10281-3|year=2010|publisher=Elsevier Ltd|author=Sara Paterson-Brown, Phillip Bennett, Catherine Williamson|title=Basic Science in Obstetrics and Gynaecology (Fourth Edition) - Obstetric pelvic definitions and dimensions}}</ref> || 9.5 to 11.5 cm.<ref name="pmid21509231"/>and the pubic bone by the symphysis.
|-
! Intertuberous diameter