1 Quantity=50pcs Replace Cotton Balls 15mm Pompon Aromatherapy Essential Oil Diffuser For Locket Necklace Main Material:Cotton 10pcs of each color, total 50pcs. Mixed 50pcs/lot of high quality replace Cotton ball for your aromatherapy diffuser locket or necklace. 0.59" (15mm) diameter - Fits many different brands and styles of diffuser necklace. There are 3 sizes pompon in my store: 15mm,20mm,25mm. If you want to buy other two sizes pompon, pls go to my store. Welcome!