to 6/7ish mm (2g or maybe even a 0g) to have clear tunnel and get two captives. One will be segmented and the other will be the bead captive.
So this would be the kind of Tunnel I want
Then I would have my 3/4ths diameter segmented captive
Then behind of the segmented ring I will have a beaded captive with a Light Blue Opal gem bead. The diameter will be a 5/8ths ring.
