This navel piercing is double jewelled, the top ball is 5mm and the bottom ball is 8mm. Please note due to hygiene this product is not eligible for return. Titanium Double Jewelled Belly Bars - Purple£4.00PriceLengthSelectQuantityAdd to BagMaterial:Titanium Gauge:1.6mm Ball Size:Top ball - 5.0mm Bottom ball - 8.0mm Suitable for:Navel