Note: Please allow some errors due to manual measurement. Specification: Item Type: Silicone Earplugs_x000D_Material: Silicone_x000D_3 Sizes: L M S_x000D_Inner Diameter: Approx. 3.8mm/0.15in_x000D_Outer Diameter:_x000D_L: Approx. 13mm/0.51in_x000D_M: Approx. 12mm/0.47in_x000D_S: Approx. 11mm/0.43in_x000D_Scope of Application: Suitable for Earbuds with a Sound Guide Hole of About 3.8-5.8mm/0.15-0.23in Features: 1[High Quality Material] Replacement ear tip made of soft silicon material can provide higher sound insulation, stability and long lasting comfort, durable, flexible, replaceable and removable. 2[Good Sound Quality] Earbud tips deliver deep, stable, rich bass. Comfortable and sturdy to wear, no sound fluctuations due to ear canal squeezing and deformation. 3[Ergonomic Design] Ergonomically designed, long term wear is not easy to fatigue, the wearing comfort is improved again, and any damaged, scratched, defective or missing earplugs can be replaced. 4[Multipurpose] The earbuds fit the for WF?1000XM3 WF?1000XM4, fit into the charging case, and are also compatible with for beatsX, for Senso and for most other earbuds. 5[Compatible] These earbuds are compatible with over 98% of headphones. 3.8mm wide opening. Compatible with headphones using 3.8mm?5.8mm sound holes. PackageList: 6 x_x000D__x000D_Earbud Tips