Fashion Jewelry. Silver Tone Snap Button Necklace fits 18/20 mm Snap Buttons. Fits Magnolia and Vine Jewelry, Gingersnaps and Noosa Jewelry. Pendant Round Shape. Chain length 16 inch and has a 3 inch extender. Does not fit 12mm/Petite Snap Button Jewelry. *Snap buttons sold separately* Check out my closet - I have hundreds of beautiful snap buttons. Create a Bundle and I can make you a special offer. Brand New. Interchangeable.