So, I didn't know that jumping spiders aren't able to sink their fangs into a roly-poly and I put one in about a week ago, and it was probably a few mm big, but now it's about five times the size that it was before.... I've never seen one that big!
I ended up keeping it in another container to see how big I can get it... it's huge already, bigger than Aspen and she's full-grown(10mm)!!