u/Fearless_Growth_7755

How do i make fake biceps for a short sleeved compression shirt character? I am planning to cosplay the shinjuku showdown gojo satoru in his short sleeved compression, but i do not have the bicep size that he does. I am currently searching for a solution that doesn't require a body suit, does anyone know how I can solve this?

P.S i have also seen some people use some sort of fake silicone bicep and stick it on their own bicep, don't know what the name for this is either.