~ Snap Charm December Birthstone Interchangeable Jewelry Snaps 20mm 3/4" Diameter (Blue Topaz) ~ Gorgeous birthstone snaps for the month of December ~ Standard size snaps measure 20mm or approximately 3/4" ~ Fits all brands snap charm accessories for standard size snaps and is compatible with Ginger Snaps ~ Choose from each month with its own colorful birthstone ~ Brand new from manufacturer