Material:Durable silicone rubber.Provide the safest guarantee for your essential oil bottles ^ Size:5ML silicone sleeve fits for thick mouth bottle which width 22mm and height 50mm,the holder total length:140mm;10ML silicone sleeve fits for narrow-mouth bottle which width 20mm and height 72mm,the holder total length:190mm;15ML silicone sleeve fits for thick mouth bottle which width 29mm and height 66mm,the holder total length:152mm.^ Easy to use: Simply loop the adjustable strap around your purse strap, belt loop, etc and push down through the hole. Then tighten by pulling the strap up to the next adjustment ball.^ Portable:A great way to protect your essential oil bottles while giving you the freedom to carry them with you wherever you go. Simply loop the adjustable strap around your purse strap, belt loop, etc and push down.^ What You'll Get:6pcs/set Random Color Silicone Sleeves( Yellow, Green, Pink, Blue, Purple and Orange)