Calf, Upper Arm, Neck=36%
Your upper arm should be about 16.67". So yeah, you're instinct is correct. Your upper arm is lagging. Your chest measurement should be around 46-47".
BTW, our stats are somewhat similar.
I'm 5'9", 185lbs.
Upper Arm: 16.3"
So right now, my torso is outgrowing my arm, and thigh a bit.
And that shoe joke is ancient...O-o-oo-o-oo-oo-ld school T-Nation inside joke..or was it T-mag? or Testosterone.net?