I absolutely love how this blanket turned out. I(tm)m sure this blanket will be a hit with whoever you(tm)re making it for.
This project is not for a beginner to crochet. I would classify it as more of an Intermediate skill level due to the fact that this project will have multiple skeins of yarn attached at the same time.
This blanket can be made as large as you want. For the best result, you should use 3 skeins/balls of one color and 1 skein of a contrasting color. However, you can use 2 skeins of 1 color and 2 skeins of a contrasting color. You can use 4 different skein colors however it will not show off the spiral very well.