progress: stash busting rug

Since I started crocheting, I have collected all of the yarn that I don't really like working with for one reason or another (usually it is because it is scratchy--I hate that!) and stashed it in this giant bag, hoping to put it to use one day. Some of it is from bags of random yarn from thrift stores and yard sales, and some is decades old skeins my mom gave me. Now that winter is setting in, I've decided to use it to make a giant crochet rug to fill my living room and warm these chilly wooden floors.

I'm using a size M (9.0 mm) hook with 3 strands of worsted weight yarn per round. I'm trying to use shades of the same color together to blend in some of the uglier colors inconspicuously to use up those, too. I started out with 8 hdc for the first round and added 8 evenly placed increases per round. Each new round after a color change is worked into the back loop only, giving it the horizontal ridges you can see in the photo below.

So far, the rug is a little over 2 feet in diameter. I'm hoping for at least 8-10 feet before I either run out of yarn or the will to continue. Since this is all washable acrylic yarn, I want it to be small enough to still be able to fit it in the triple loader at the laundromat.