Very small, could fit on my pinky finger. Found running behind my sink (between faucet & window) as I did dishes. I have orchids hanging above there, could’ve been going for those, or come in that window. I have some Parasteatoda tepidariorum that came back after a month or two away that have taken up residence in that window since I moved in in August. Maybe their buggie graveyard attracted this one? Who knows. I’ve had a mature male in the house before. It had spinnerets that stuck out from the body a little, and it looked to be laying some silk down? Moving its abdomen side to side, and I saw the silk. Very cool.