rosies can get nearly as big, but are prone to dramatic changes in personality for no reason. I used to handle mine but one day she charged the forceps and grappled them with her fangs and I nearly lost my grip on them. She laid an infertile egg sac on thanksgiving so I am wondering if she will go back to the way she was now. Before she went nutters though she would respond to prods by the paintbrush I use for herding them by moving along as I guided her. My PZB however was like that classic image of a mule being dragged or pushed along. He would let me push him all over his cage without the slightest hint of annoyance or nervousness but would leave drag marks everywhere.

PZBs (Pink Zebra Beauty, E campestratus) can get slightly larger than the rosie, but is more attractive IMO. Rosies get between 5 and 6 inches on the high end but the PZBs will get that big easily and sometimes a tab larger - but as with all T sizes you can vary an inch depending on who measures it. I measure mine with the legs in the bent walking position but others may measure them in the fully extended position and you can imagine what that does to their perceived size.