How much can I increase my bideltoid width?

[Incoming]

Im 5'11 and have been working out for about 5 months. I just measured my bideltoid today at 20" which is above average but I don't have the definite broad shoulder look. Is it possible to reach 21.5" bideltoid from this?
How much of an increase have any of you gymcels seen in your bideltoid?

 

[john2]

Train your shoulders, hit the gym ofc.
Maybe around 1-2 inches max imo.

 

[Hero of the Imperium]

I went from 20" to 22" thus far. But I started at 20".

Shoulders and lats. And chest

 

[Incoming]

Train your shoulders, hit the gym ofc.
Maybe around 1-2 inches max imo.

Yeah I just started incorporating lateral raises and rear delt fly’s
Before I was only training my front delts with OHP

 

[Pinhead]

Depends on your genetic potential for deltoid mass and the weight you're at, plus predisposition for fat storage in the delts

Another thing that also widens you is having more mass in your back. Your arms will "sit" on the built up lat muscle - this widens your shoulders by flaring your arms out. It's a constant gain as well since unless you lose the mass in your back, your arms will maintain the new position.

I'd say 0.5-1" from lat flare

3" max on deltoids with 1.5" from each side and probably 0.3-0.5" of that being from fat tissue. Most people stand to gain around 1.5-2" i'd say with the skinnier guys standing to gain more (but maybe only if they roid since smaller muscle bellies means less mass gained)

this is how most guys appear big. They have an otherwise average frame and pack more than average amounts of muscle mass on a body. Only a small percentage of men are both big boned and obsessive gymcels to the point they've got their delts capped and lats flared.