How big is a brown recluse spider?
A brown recluse is not a large spider. It is about the size of a lead weight that you would put onto a fishing line. The brown recluse and the black widow are two poisonous spiders found in the US. Neither one has enough poison to kill a person. The danger is that their bites cause infection, which can damage large areas of tissue. The bite of a brown recluse usually turns black within a few days, and swells up around the bite.