About this item A revolution in sound performance, with foam that expands at the perfect rate. Enjoy crisp, clear sound and comfort for an all-day immersive experience. Memory foam is a degradable material; each pair should last up to 4 weeks. Designed specifically for earbuds with a speaker diameter of between 5.8 - 6.5mm. Dimensions: 4.72 x 4.72 x 4.33 inches.