Not For Beginners! This is NOT normal size. This is very thick. However, my calipers report that it is not 3.15 inches diameter, but only 3 inches. That's not off by much, but in case it makes a difference to you.
It is very heavy. It's so heavy that the suction cup can hold it horizontally on a ceramic wall tile, but it struggles to keep it there. Doesn't take much at all to break it loose. Sticking it to the floor, on the other hand, it holds very firmly because gravity is helping it.
It feels just like you expect dual-density silicone to feel. Lifelike and squishy outside, bendable, but firm enough that it's not going to bend unless you want it to. The taper makes it much more comfortable to insert, and makes it so that diameter increases very smoothly. If you're looking to stretch, this is a good way to to it.
I thought my 2.63 inch diameter one was challenging to get all the way in and moving to a 3.15 inch (advertised) would take me a couple of days or weeks to fully insert, but got it on the first try. Now what do I do? I need another one that is 3.5 inches diameter I guess.