craftgrrl | Help with cardstock

I have some cardstock and I am trying to figure out the weight of it because I am ordering more from a different company. I have examined every inch of the package and the weight is not listed anywhere. I've Googled the company name, checked Ebay, and basically searched everything I can think of for the last half hour so I promise I am not being lazy and trying to get someone else to do the work for me.

Anyway, it's a very basic, lightweight cardstock that I got from Michael's. I want to start using recycled paper and I can only seem to find recycled white cardstock online but I need to know what weight I need. I'm worried that 80# (which is what seems to be the most available) is going to be too thick (I am using the cardstock for hang-tags, so it can't be super thick). So I'm hoping maybe someone with more knowledge of cardstock will happen to know (or have a good idea at least) what I actually have.

Help? Please? Pretty please?