6'0

>6'0
>12.5" biceps flexed

How long would it take for someone to get 15" arms?

Just an estimate, given a decent diet and routine.

6 months, 1 year, 5 years?

workout your arms a lot and include lots of high rep isolation (8-21) and every 10-20lbs lean bw gain you'll get an inch

also stop believing these dumbasses that you can build huge arms with only/mainly compounds, these guys are all midgets so they have big arms at 12"

anecdotal evidence is everywhere, during summer you see all these curlbros with HUGE bis and literally flat triceps and all they do is lot of isolation "bro exercises" for their biceps. now include also your tris that are more than half of your arm size and after gaining +45lbs lean muscle you'll have decent arms for your 6' stature

>5'10
>8 inch biceps flexed

JUST

> stop believing these dumbasses that you can build huge arms with only/mainly compounds
This makes me feel better; I have injuries so I have to isolate biceps/triceps and keep my shoulders still and supported.

Would the machine in pic related, and the tricep version of said machine be enough? There's few exercises I can do with my injuries.

I'm 6'0 myself and my arms are 15" unflexed and 16.5" flexed. It took me about two years or so but I hit arms twice a week.

> It took me about two years or so
How big were your arms before the two years?

Pretty much this. As a complement, you should be training bis/tris 3-5 days a week if you want it to get big. High volume, not no much intensity.

prolly not quite good enough, if you can use those machines you could prolly do cable rope curls and cable rope tricep pushowns which i both recommend as someone who gets forearm tendonitis from too much regular curls and elbow pain from most tricep exercises

2-4 sets of 10-16 reps of rope cable curls with many sets of LIGHTweight 12-20 rep or dropsetting dumbbell hammercurls or concentration curls should be doable for you

for triceps id do the same 2-4 sets of 10-16 reps cable rope pushdowns with plenty of (closegrip) bench, sometimes I just do my CGbenching with ezcurlbar and pump out a ton of reps for sick pump

those machines could be added on top of these exercises depending on your routine but imo they scream injury to me unless done very light

Tomorrow's my first day at a gym since my injuries. What do you mean by low intensity?
I plan on doing ~20 reps until absolute fail

My injury is the sternoclavicular joint >pic related. Certain arm and shoulder movements make the joint almost dislocate, and it is very unpleasant.

Thank you for the advice. It's nice to hear that I don't have to reach fail within 6-8 reps, as I think I'd damage myself.

I'm excited to try rope cable curls and tricep extension. I had completely forgotten about those exercises.

10 or 11"