Hmmm...not sure to quite describe how thick it is. I will say that it's thicker than my other bags are...the ones I used Noro for. It might not have anything to do with the yarn, though, but the pattern. The slip stitches give the bag a totally different feel.
As far as lining the bag, no, I won't. I've never lined my bags, and they seem to work fine.
I'm bummed cause I wanted to use the purse today, but I'm wearing brown, and the purse won't really match, although that's never stopped me before.
I can't wait to show it off!