Alopecosa fabrilis is a large wolf spider in which the males have a body which is 10 to 12 millimetres (0.39 to 0.47 in) long while the larger females have a body which is 11 to 14.7 millimetres (0.43 to 0.58 in) long.[3] The largest females may attain a leg span of 5 centimetres (2.0 in).[2] The prosoma Is reddish-brown in colour and has obvious black stripes radiating from its centre with continuous horizontal stripes along the sides.