Original: The diameter of Sycorax is estimated at 150 km (assuming albedo of 0.04) making it the largest irregular satellite of Uranus, comparable in size with Himalia, the biggest irregular satellite of Jupiter.
Simplified: The diameter of Sycorax is estimated at 150 km (assuming albedo of 0.04) making it the biggest non-spherical moon of Uranus, comparable in size with Himalia, the biggest non-spherical moon of Jupiter.