About this item A revolution in sound performance, featuring 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 to fit perfectly inside the charging case. Available Sizes: Small, Medium, Large & Tester pack (S/M/L) Eartip Dimensions: S=11mm wide / M=12mm wide / L=13mm wide / Height for all sizes 8.5mm. Product dimensions: 5.2 x 2.76 x 0.94 inches.