Feature: 1. WIDE COMPATIBILITY: The earplug tips feature a standard 4.0mm wide opening and are compatible with most headphones on the market. Suitable for use with 4.0mm/0.15in‑5.7mm/0.22in wireless headphones or other wired headphones with internal holes. 2. UNIQUE DESIGN: The earbuds earplug have a built in recess that does not interfere with the Bluetooth charging compartment, making these earbuds more suitable for Bluetooth headphones than normal. 3. ERGONOMIC DESIGN: Earplug replacements are comfortable to wear without sound fluctuations due to squeezing and deformation of the ear canal. The ergonomic design is not easily fatigued by long‑term wear. 4. PERFECT REPLACEMENT: Replacement earplugs are suitable for any damaged, scratched, defective or missing earplugs, giving them a new lease of life. 5. DIFFERENT SIZES: 1 pair each of small and large sizes, 3 sizes, 1 pair of earplugs for each size. The different sizes allow you to find the best fit for your earplugs. Specification: Item Type: Earplug Tips Material: Memory Foam Colour: Black Applicable: For Headphones with 4.0mm-5.7mm Sound Hole Memory Foam Middle Silicone Tube Aperture: Approx. 4.0mm/0.15in Three Sizes: Large, Medium and Small Large Size: Outer Diameter: Approx. 11.2mm/0.44in Height: Approx. 7.0mm/0.28in Inside Diameter: Approx. 4.0mm/0.15in Medium Size: Outer Diameter: Approx 10.8mm/0.43in Height: Approx. 7.0mm/0.28in Inside Diameter: Approx. 4.0mm/0.15in Small Size: Outer Diameter: Approx. 10mm/0.39in Height: Approx. 7.0mm/0.28in Inside Diameter: Approx. 4.0mm/0.15in . Package List: 6 x Earplug Tips Note: Manual measurement please allow some errors.