These colorful birthstone butterfly ornaments are Ganz Crystal Expressions. The Modern Birthstones are: January - Garnet, February - Amethyst, March - Aquamarine, April - Diamond, May - Emerald, June - Moonstone, Pearl, July - Ruby, August - Peridot, September - Sapphire, October Opal, Pink Tourmaline, November - Topaz, Topaz, Citrine and December - Turquoise, Zircon, Tanzanite, Blue Topaz. They are three inches wide and made of acrylic. Very colorful.