https://www.researchgate.net/profile/Rosanna-Ricafort/publication/51463184/figure/fig3/AS:394130757832706@1470979503525/Genital-stages-in-males-Stage-1-is-prepubertal-Stage-2-is-characterized-by-enlargement_Q640.jpg

https://cdn.lecturio.com/assets/Tanner-staging-boys.png