Call Me By Your Name Initial Pendant Necklace

I like the look of this letter M necklace but it's very frustrating to wear.it sit to close to my neck(the size would be perfect it if actually stayed in place) and the charm constantly flips to the opposite side.it lacks the proper weight balance at the clasp to keep the pendant forward.I'm goign to have to buy a necklace extender to add some lenght and hopefully use the extra weight to keep the charm in place