Yay, another tutorial involving studs! :)
I've found my inspiration here on Pinterest:
...and decided to give it a try, in a slightly different way.
Get some barrettes.
If your studs have 4 clasps/prongs, remove two opposite lying ones.
If your studs are rather large like mine, prepare felt squares and hot glue them into the studs for a better basis.
Start hot glueing the studs on your barrette.
Don't forget to bend the clasps/prongs so that nothing will hurt you when you wear the barrette.