The specs are pretty accurate on Eden, although I haven't tried this one myself. Under the pic they have an option next to the ruler that shows a 1:1 actual size. Of course there is no rule that those new to toys won't like big ones, and if you don't like it... it would make an interesting conversation piece!!
I can't stand sil-a-gel stink, so I'm getting the John Holmes UR3 one by the end of the year. It has a beautiful circumference of a full 8"!!! I really miss my last 8" circumference dildo