Does anyone else have biceps that are different sizes? e.x. one

Yeah, my right arm is about an inch and a half wider than the left

Personally, I add another two sets on the smaller arm, with things like kettlebell/dumbell workouts anyway.

Slow and steady progress, there may be a better way to go about it

>>41800231
alright i'll try that out

If your doing free weight stuff make sure both arms are being worked the same, I.e. 3 seconds down on both and the same reps

>>41800275
Don't do that. You might just make them more imbalanced. Work strictly with dumbells OP, you are probably cheating on the bar without realizing it. Always start with the weaker arm and stop with the stronger one wherever the weaker one gassed out. Do this for about a month or two and your body should even out, though if you have a really fucked up imbalance it may taker longer.