When I started making the beaded pins, I searched for the longest pins I could find. This proved to be quite a task. I started out with a #20 size pin, but found it was not quite long enough.
Now the fun part. I use 527 glue, but I think you can use any good glue that will keep a good hold (not a school type glue).
(if you need more glue, I take a toothpick, dip in the glue and spread a little more on the area of the pin where the beads will reside)
Allow to dry by laying the pin on it's side.
You can make any number of combinations to make pretty beaded pins.
This was a very fun project to make, and is wide open to your own creative ideas.