I did this project a LONG time ago, like over a year ago, before I even started really getting into crafting. I saw a post the other day on a blog I frequent that was very similar. It really makes you think you're doing something right when you see a designer post a project like this on their own blog. I have also seen a few other pictures of great ideas using these same letters from Hobby Lobby. You can do so much with them!
You can use the letters as a monogram, or like the post I found the other day, you can use "Mr & Mrs", or spell out something. The "Mr & Mrs" was cute, but I like my idea better. :)
This is the Polystone Letter from Hob Lob. The price on their website and in store is usually $9.99, but if you use one of their famous 40% off coupons (which I do every single time I go), it's not bad at all. Also, they are almost always having a sale on lots of different products, so you're more than likely going to catch what you're looking for on sale fairly often. These were on sale the day I got them, at 50% off, so that was really nice.
You can also find something similar from Ballard Designs:
(Sorry, had to throw that in there. Still a little proud of myself.) :)