 Growth rate of human fingernails and toenails in healthy American young adults by S. Yaemsiri and others

Primary byline S. Yaemsiri, N. Hou, M. M. Slining and K. He. Journal of the European Academy of Dermatology and Venereology 24(4), 420–423, April 2010; first online 8 September 2009. DOI 10.1111/j.1468-3083.2009.03426.x. The abstract describes 22 healthy young adults marking nails with a supplied file and measuring mark displacement over one to three months. Mean fingernail and toenail growth rates were 3.47 and 1.62 millimetres per month.