Seems to be very calm, it did not move for at least 20 minutes while I went to get the camera and a ruler.
After looking through some pictures, possibly Platycryptus undatus?
Yes! Thanks for giving it a try. I love it when spiders are polite enough to stay still while I get my equipment ready! Jumping Spiders are the easiest for me, some seem to even ham it up for the camera. I’ve seen this species often this Autumn, more than other Jumping Spiders. The dorsal markings look like a flattened chain to me.
In fact he or she was still in that exact same place the next morning, only moving when the bathroom got all steamed up when I took a shower.