My younger daughter finished her crochet blanket a little while ago, but I wasn't able to get a photo of it until recently.
The basic pattern was free off a yarn label. She changed it slighly to make it bigger.
As you can see, it's a pretty decent size! Large enough to cover a twin bed. When she reached the length recommended in the pattern, she simply continued the same pattern around the sides as a border. It took her 3 balls of the huge 300g size Bernat Chunky to finish this.
It's kind of hard to tell, but this is a corner turn.
She's very happy with it, and uses it every night. :-D I think she did a great job - and displayed a whole lot of patience to finish it!