From a meta analysis from last year by the Association of Urology, "Penis Length and Circumference According to WHO Regions (2025)"
https://pmc.ncbi.nlm.nih.gov/articles/PMC11923605/European men, on average, are larger than Africans in both erect penis length and circumference.
>…the mean length of [erect] penis was largest in men living in the Americas [14.47 (0.90) cm] followed, by decreasing order: Eastern Mediterranean [12.95 (0.66) cm], Europeans [12.61 (0.59) cm], Africans [12.59 (1.1) cm South-East Asians [10.88 (0.08) cm] and Western Pacific men [11.57 (1.66) cm] (Figure 2).
>The mean length of flaccid penis was largest in Americans [9.86 (0.90), followed by Europeans [9.71 (0.46) cm], East Mediterranean [9.30 (0.12) cm], Africans [9.22 (1.07) cm], South-East Asians [8.21 (0.08) cm], and Western Pacific men [8.00 (0.67) cm] (Figure 3).
>The mean flaccid penile circumference was largest in Americans [9.74 (0.25) cm] followed by Europeans [9.36 (0.24) cm], South-East Asians [9.14 (0.06) cm], and Eastern Mediterranean [8. 96 (0.18) cm], Africans [8.78 (0.06) cm] and Western Pacific men [8.40 (0.03) cmAnd unlike previous studies, only clinical evaluations were considered eligible, not self-reports.