I wore it for about two days. ~Our store uses materials that are all metal allergy-friendly and rust-resistant~ [Uses Silver925 + 18K Gold coating material] ~Silver925~ One of the high-quality materials alongside gold and platinum. Made of 92.5% pure silver, it is a material with extremely low allergenic properties. The design blends into everyday life, so you can leave it on all the time. You can use it for a long time. [Metal allergy-friendly] Both 18K and Silver925 are materials with low metal allergy properties, but individual constitutions vary. In rare cases, some people may experience metal allergies, so If you feel any abnormalities, please remove the earrings immediately. Material: Silver925 Head (decoration) size: Approximately 3mm x 13mm Gauge size: 18G Shaft size: 6mm Color: Silver Cartilage piercing Straight barbell type 6mm