Maximum compatible headphone dimensions (inside): 7.48 x 6.29 x 2.75 inches. Compatible with many wired / wireless headphones. Engineered ultra-hard shell protects against drops, impacts or crushes. Soft inner maximize headphones protective in the case. Internal mesh pocket conveniently stores cables, cords, chargers, AMP, earpads, adapters and other accessories. Compatible with Sony WH1000XM4 ,WH1000XM3, WH1000XM2, WHXB910N, MDR1000X/C, MDR1000X/B, MDR1000X, WHXB900N case. A good replacement or upgrade of the original headphones case. If the Sony case doesn't fit or break within one year, Geekria will replace or refund. No question asked.