Brown recluse spiders are usually between 6 and 20 millimetres (0.24 and 0.79 in), but may grow larger. While typically light to medium brown, they range in color from whitish to dark brown or blackish gray. The cephalothorax and abdomen are not necessarily the same color. · Brown recluses are small spiders with light-brown bodies and legs, 6 eyes, and fine hair on their legs. True to their name, brown recluses favor sheltered, out-of-the-way places and typically aren't out in plain sight. Brown reclusespiders are native to the southeastern and midwest United States. · In this article, we’ll explore the actual size of the brown reclusespider, compare it to other spiders, and provide a clear understanding of its scale in everyday terms. · With legs extended, adult brown recluses span about the size of a U.S. quarter. Females can have a leg span over 1 inch, while males are about half the size of females in body length but often have proportionally longer legs. Brown recluse spiders, scientifically known as Loxosceles reclusa, are brown spiders measuring 6 to 20 millimeters in body size, with leg spans that can exceed 25 millimeters. Understanding their brown recluse size is crucial for identifying these spiders accurately. · Learn about the average length and weight of brown recluse spiders, and how they compare to other venomous and non-venomous spiders in the United States. Find out how to identify, treat, and prevent brown recluse bites and infections. · Brown recluse spiders (Loxosceles reclusa) are members of the Sicariidae group. Adults have a body length of 6-20mm. They are characterised by a dark violin-shaped mark on the cephalothorax and six pairs of eyes instead of the typical eight-eyed spider.