Not exactly sure what a collier bracelet is. Am guessing that it has a lobster claw clasp instead of the traditional Pandora clasp? At any rate, if it has the traditional screw ends, I doubt a Troll stopper will fit. I have tried a to cram a stopper over the end of my Pandora chains and can get them onto the tip of the screw but it won't go completely over it and down onto the bracelet. Hence, I replaced all of my Pandora chains with Trollbead chains.