Yeah, Syrians are, I think, the biggest hamsters you can get. They get about hand size I believe. Though are the Teddy Bear version smaller? I had one when I was younger and I remember it being smaller.
Oh, and do not mean to thieve on your thread but I was actually going to post a similar thread...So my question is. How big a cage for Robo Hamsters? And are they required to have a cage mate?