I'm back to show you one of many blankets I crocheted in the past which is a zigzag blanket or crochet waves blanket.
I challenged my self to finish it in one week coz it wasn't a big one but failed, I think I finished it in two weeks.
I used redheart designer sport and followed the pattern mentioned here
The crochet hook is the same number mentioned on the yarn ball which was 5 mm for the one i used.
Hope this helps.