My stripey dress from the weekend is from Old Navy* - you can find it here. It's a decent weight cotton and pairs well with tights. I add a belt to keep it from looking quite so sack-like.
I'm also living in these super soft roll sleeve jersey tees. Nothing special, looks wise, but so comfortable for lounging around and they're nice and long for those of us with oddly long torsos and an aversion to showing our stomachs.
I ordered everything online, because I simply couldn't face the prospect of a trip to the store.
*I swear I am not paid by them in any way. I just seem to have an intense like/hate relationship that comes out a bit too frequently on here.