Size: Thickness is 18G(1.0 mm), Inner Diameter is 9/32 "(7 mm) This 7mm nose hoop is very small. So if your nose is big or your nostril piercing is higher, don't choose 7mm. When the hoop is tight for your piercing, your nose will feel uncomfortable. So please check inner diameter carefully, and select most suitable size for your piercing Material: This nose rings hoop made of high quality 316L surgical steel, 5 vibrant colors (Silver, Black, Gold, Rose Gold, Rainbow) It can be used as nose rings for nostril piercing ( piercing is closer to the edge ), helix earring hoop, forward helix earring, rook earrings, daith earrings, tragus earrings hoop, cartilage earring hoop and second or third lobe piercing hoop Thoughtful Gift: A perfect rings hoop earrings present for women or men with piercings or an interest in body piercing jewelry Thickness is 18G(1.0mm), Inner Diameter is 9/32 "(7mm). This 7mm nose hoop is very small. So if your nose is big or your nostril piercing is higher, don't choose 7mm. When the hoop is tight for your piercing, your nose will feel uncomfortable. So please check inner diameter carefully, and select most suitable size for your piercing.