Maximum compatible headphone dimensions (case inside): 9.2 x 9 x 5.3 inches. Compatible with many wired / wireless headphones. Engineered hard shell protects against drops, impacts or crushes. Soft inner maximize headphones protective in the case. Internal mesh pocket conveniently stores cables, chargers, AMP, earpads, adapters, iPod and other accessories. Compatible with Sennheiser HD 820, HD 800 S, HD 800, HD 700, HD660s 2, HD 660S, HD 650, HD 600, HD58X, HD579, HD 569, HD 560S, HD559, HD 471i, HD 471G, HD 461i, HD 461G, HD 400 Pro, HD 380, HD200 PRO, PXC550 II, PXC 450 case. A good replacement or upgrade of the original headphones case. Compatible with Sennheiser GSP 670, GSP 602, GSP 601, GSP 600, GSP 550, GSP 350, PC 333D, PC163D, MB 660 UC MS, HDR 120 case. If the case doesn't fit or break within one year, please contact us.