The sapphire blue gems are 13mm with 5mm at the thickest part. They are 16k gold plated glass gems. The peridot (green apple) squares are 9mm. The ear wires are 14k gold filled. The length of the earrings is approximately 1.5 inches long. These earrings are so simple and classy. They can be worn for a variety of occasions - wedding, evening, etc.