About this item Measure your earphones nozzle, these memory foam ear tips fit many earphones with 4.0mm-5.5mm nozzles, suitable for both wireless and wired in-ear options. Made from high-quality polyurethane foam, these memory foam tips are safe and non-toxic, specially designed for in-ear earphones, offering a softer and more comfortable fit than ordinary foam materials. The slow rebound memory foam tips provide a snug fit close to the ear canal, ensuring anti-slip performance and 24 hours of comfort, making them ideal for long wear and exercise. After extensive testing and design, these memory foam tips deliver a superior audio experience with enhanced bass and effective sealing to block out external noise. Includes 3 pairs of small size memory foam tips, perfect for smaller ear canals, along with a plastic storage box. Dimensions: 4 x 3 x 0.4 inches.