Titanium galaxy blue heart cartilage earring. Gauges available: 1.0mm (US 18g) or 0.8mm (US 20g). Size: 10mm. High quality, medical grade titanium heart shape ring. This cartilage earring is in blue metal colour. Suitable for most people with metal allergies. This jewellery can be worn in various ear cartilage piercings such as helix, auricle, daith, rook and forward pinna (also known as forward helix).