Skip niobium heart seam ring images slider SKU: Niobium Heart Seam Ring Sign-up to see price The Niobium Heart Seam Ring is available in 16g, 18g or 20g and in three sizes. Product Details: Material: Niobium Gauge: 20g, 18g, 16g Size Options: Small (~8mm), Medium (~10mm), Large (~12mm) 13 anodized color options