This is a 2 inch acrylic round "key chain". I put vinyl on it and a jump ring and it is the cutest necklace. It could definitely be reversible with a coordinating design on the other side...just haven't gotten to that yet!
I tried my hand at making washer necklaces. I'm going to be giving a few of these sets for Valentine's Day. I used polka dot vinyl on a washer and a ribbon - super easy.