The key here is the goal was to measure arm size. If this was a science project on making bigger arms, then it is beneficial. But I am not a science project.
I know doing curls helped me not have so many arm strains and doing triceps made my presses finish better/easier and I got stronger overall.
Arm size? I have no idea, nor do I care.
I am Anton Zdravko Martin!
Best meet lifts: Sq 150 Kg (330 lb), Bench 120 Kg (264), DL 160 (352) @89 Kg (197)
Best gym lifts: Sq 375, Bench 280 (pause), DL 385 @205 or less
Goals beyond my wildest dreams, 600 Kg raw total, 200/160/240
Hack away at anything which isn't essential. Do what you love, and do it often. Fazc.