Specification Material: good quality silicone. Size: 9-10mm/0.35-0.39Inch.Styles: Stanley straw caps. Package: 10pcs.FeaturesPackageIncludes 10pcs different straw cap toppers cute and stylish the creative caps shapes are decorative and suitable for adding exquisite designs to your straws. Material & Size. The Stanley straw covers are made of good quality silicone durable reusable non-toxic and tasteless they fit 9-10mm/0.35-0.39Inch straws. Reusable Easy to clean and reusable. protect your straws and cups from polluting by dust and others. Easy to Use these straw caps can be fixed on straws directly and hang on the straws not easy to fall off and helpful for keeping your straws from dust. Customer Service Please contact us about product problems we will provide you with the best service and offer a prompt refund or replacement in time.