Finished size is about 26" x 31". My Walmart did not have the Red Heart Super Saver Royal Blue which is what I wanted to use. They did have the blue, so I used that. The picture actually shows it up well but in person I find it a little light for a TARDIS. It took less than 2 skeins of yarn, probably about 10 ounces.
I will put the pattern with chart at the web site eventually. [update: I am having problems getting the pattern on the web site, but it is up at Ravelry]
The pattern is worked in 3dc mesh. The chart has blue x squares and solid white squares. I used the blue squares as open mesh and the white squares as solid squares. I know this is probably opposite of what most patterns do, but you can work it whatever way you prefer. I like a more solid piece myself.
I used an I hook. It took me only two days to make it. I could have finished it in one if I'd had the yarn on hand already. It's very simple. You only have to know chain, double crochet and single crochet and how to follow a chart. The pattern is symmetrical so it doesn't matter if you read from left to right or right to left. The center is wider than the sides to allow for a keyhole/handle though I didn't put one on there.
You could conceivably make a separate piece with letters. I actually considered making the top section in single crochet and try to do some kind of stitching of the words, but decided it didn't matter to me enough to do that.
For what it is, I think it came out pretty well. Perhaps a Whovian parent would appreciate it although they might then ask for the larger version. LOL That one is also not difficult to do but would take a bit longer.
The pattern is not as visible with filet as with a worked in color version but IMHO it's easier to do than the worked in one.