Well, you want to remove material from the bottom of the sleeve, where it won't really be seen much anyway. You can get away with slightly different links, or even just lace it together.
Just be sure not to remove too much! It's easy to make that mistake. The sleeve still needs some slack in it, so you only want to remove a little bit. You might want to try using a lace and tie the sleeve together where you're thinking of making the cuts, and see if you can still bend your arm in it.