Mine just says Medium weight on it, but there are six sheets size 8 1/2 x 11, can't remember how much it was, but I just got it at AC Moore near the packs of cardstock. I was looking for it for awhile too! It is acid-free and made by Grafix in Cleveland, OH. http://www.grafixarts.com. Hope that helps!
Danielle
I purchased a bulk of 8X8 chipboard from ebay & I also get it from my job from the package the medical claims come with...If you pm your info, I can send you some of the chipboard that I'm now starting to accumulate...I get like 4 sheets per day from work...
Someone is on ebay selling like 250 sheets of cs for like 11.99 buy it price...They indicated it is acid free & he has proof...These are 8 1/2 X 11 sheets...