1/32nd 00 or 0
1/16th 00 or 0
1/8th 0 or 1
1/4th 1
3/8th 1 or 2
1/2oz 2
3/4th 2
You can use bigger on any size head but make sure it runs nice and straight.
I use a size 0 split ring to connect but lots of folks are using butt rings.
For the swivels use a #12 up to 1/8th and #10 for everything above.