It is the shark fin appearance that makes the earphone cover fit the auricle better and ensure good sound quality. You can wear it for a long time because it won't get rid of your earphone and it has has strong stability and soft material. Featuring dust-proof, waterproof, reusable, and washable, the earphone cover won't be blocked. In addition, the in-ear part can be inserted into the ear, which is more soundproof and durable. Made of high quality silicone material, the ear cap is soft, comfortable and anti-scratch. The length of the ear cap is 3.2cm, the width is 1.7cm, and the height is 1.7cm. It's applicable for BOSE Soundsport QC30 QC20. Item Name: Earphone Cover Material:Silicone Compatible Models: for BOSE Soundsport QC30 QC20 Size:3.2cmx1.7cmx1.7cm/1.26inx0.67inx0.67in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. One set for each pair of large, medium and small, 3 pairs is one set. (The middle of the large is black, the middle of the medium is gray, and the middle of the small is white) Package Includes: 6 X Earphone Covers