: The average length of the first metacarpal was 47.6 mm (±3.3 mm, 39.2-56.9 mm). The average radius of curvature was 55.5 mm (±10.7 mm, 33-78.9 mm). Inner bone diameter, measured in two axes, was 10.5 mm (±1.3 mm, 5.4-18.7 mm) for the major axis and 7.7 mm (±0.9 mm, 4.3-17.8 mm) for the minor axis.
Vaux, J. J., Hugate, R. R., Hills, J. W., Grzybowski, R. F., & Funk, C. K. (2015). Morphometrics of the human thumb metacarpal bone: interest for developing an osseointegrated prosthesis. Surgical and Radiologic Anatomy, 38(1), 127–133. https://doi.org/10.1007/s00276-015-1524-6