Ear Stretching Spiral. Buffalo Horn Twist Spiral. Available in 2.5mm - 10mm (US 10g - 3/8”). Made from smooth polished black Water Buffalo Horn. The Horn used is ethically and sustainably sourced and cruelty free. Organic ear stretching spirals are breathable and comfortable to wear. For more info about Organic Body Jewellery please read our materials guide. For use in stretched piercings such as the Stretched Earlobe. For help with sizing please read our sizing guide. Unusual spiral earring for Ear Stretching.