I just saw these ones at JCP.com, Michelle.
http://www5.jcpenney.com/jcp/X.....atId=50434|50449|51550|69124
They come in a grey plaid, but it might be more of a glen plaid than an actual check pant. I really like the texture, personally. And they are more of a straight leg, which is a plus.

I haven't found anything I like or that is a true microcheck. Most of the plus size pants are plaid. I tried on some glen plaid pants at Target and nothing was fab. I am sort of giving up on that search and instead coveting a cool tweed pant.

Gap has an awesome pair of houndstooth trousers that almost look like a microcheck. I want these:

http://www.gap.com/browse/prod.....pid=620854

I love the ones that Marianna linked to

The Penney's pants do come in a plus size, but they consider those patterns "seasonal", so they come out in fall with one shipment and then they are gone. I don't think they even stock them on the website. They come out every year, though, in a slightly different pattern. They are a pretty lightweight cotton, so probably not what you want for winter.
I just found a pair of pants in a gray microcheck at Target the other day (on the clearance rack)- and they were a 14W. I do think these are out there in Women's sizes, just harder to find.

They are the St. John's Bay bi-stretch pants:
http://www5.jcpenney.com/jcp/X.....atId=50434|50438|51231