ive tied like 6 jigs, never used beads...

im also a sh!tty float fisherman, and havent even landed a fish yet because i dont practice the method religiously

take this for what its worth, its only my opinion...

make the beads smaller than the jig head, or the exact same size, no larger, preferably smaller, bigger beads would likely screw with the action you are trying to get the jig to do...

i could be totally wrong, but thats just what my mindset tells me when i start tying the things...