My right bi is 17.5" and my left is 17". Anyway to fix this?

Is the shape of the muscle different? Have you injured one or the other? Did you ever play a one-side dominant sport (ie - baseball)?
May help answer the question. You could always do a couple of extra sets of DB curls with the smaller size.
My right shoulder is jacked - injured - and I played in high school, college, then semi-pro for a few years and my right biceps peak is not as good as my left (I through right handed) and I know it's from the injury, nerve damage, and also the constant elongation from throwing. Will probably never be completely symmetrical.
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Yup i have the same problem due to a shoulder injury. Like hossjob said throw in a couple more sets for the smaller arm or just add it in on another day until you feel you have balanced them out.
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Same here. Right handed and left bi is bigger. And I even had surgery to repair a completely torn biceps tendon and still it is bigger