This is just a crappy phone picture I took on the spur of the moment with not even great lighting, but this is what my arm looks like after a year of working out. I am flexing in this photo, but did not work out before taking this (so my muscles aren’t filled with blood), and don’t have my arm pressing against my side (which is often used to make muscles look larger):

No before photo, but a year ago you couldn’t really see any muscle, flexed or not. To give some idea of how much work this takes, that’s about 210 hours of work on my arms/upper chest alone to go from no definition and poor strength to that.