Fluctuating asymmetry of finger lengths, digit ratio (2D:4D), and tattoos: A pre-registered replication and extension of Koziel et al. (2010)

•Tattoos may be associated with prenatal testosterone and used as fitness indicators.•Koziel et al. (2010) reported increased bodily symmetry in tattooed males.•We broadly replicate this previous finding in a large sample from the UK and Poland.•Number of tattoos correlated positively with fluctuating asymmetry in females.•Digit ratio (2D:4D) and tattoos were not associated when covariates were controlled.