Note: Manual measurement, please allow some errors. Specification: Item Type: Eartips Replacement_x000D_Material: Memory Foam_x000D_Size:_x000D_Inner Diameter: 4.5mm/0.17in _x000D_External Diameter:_x000D_L: 12.5mm/0.49in_x000D_M: 11.5mm/0.45in_x000D_S: 10.5mm/0.4 in_x000D_Scope of Application: The Inner Tube Aperture Of This Product Is 4.5mm, Which Is Suitable For In Ear Earphones With 4.5mm To 5.5mm Sound Guide Holes Features: 1Compatible With: The foam ear tips come with an industry standard 4.5mm/0.17in wide opening, compatible with the use of 4.5mm/0.17in to 5.5mm/0.21in sound hole headphones. 2Premium Material: The replacement eartips are made from slow rebound memory sponge material, provides additional noise isolation, ear stability and lasting comfort. 3New Look: The replacement eartips can breathe new life into your in ear headphones for any damaged, scratched, defective or missing earbuds. 4Perfect Fit: The soft memory foam changes with the ear canal and fits perfectly into any type of ear canal, perfect for securing headphones. 3 pairs of memory sponge earplugs, 3 sizes, 1 pair for each size; (each pair of L/M/S) 5Superb Craftsmanship and Small Size: Fine workmanship, delicate and compact appearance. Compact size, easy to carry, to provide you with a better headset use experience. PackageList: 6 x_x000D__x000D_EartipsReplacement