You know what? I keep stealing my coffee cup coaster to lay my phone on, and the coaster isn't even big enough for the phone!
But I like laying the phone on the coaster because it's been easy to get in the habit of putting it there, and life is less stressful if things like your keys and phone have a place of their own where you know where to find them.
So I made do and stitched up a patchwork coaster in a more phone like shape. This one is available here and later in the week, or maybe next weekend, I'm going to try to make a few more of these because they are super cute and awesome. This one is sold out, but check here to see if any others are available.
Besides being a nice home for your phone, I also think if you spilled something near your phone, this type of coaster might save your phone's life! I'm not going to test this theory out, but the cotton batting would surely absorb at least some of any encroaching liquid.
If you need some scraps to make your own phone coaster, one new bag of fabric scraps can be found here. There are bags of Tiny Scraps here and here, and one bag of denim scraps here. The scrap bags are sold out, but watch this section for new bags soon!