At first glance, I thought this was a quilt, but the blanket is made of granny squares. Any yarn type or weight can be used to make this blanket. If you want to use a similar weight as the example, you can use 4ply/fingering yarn and a 3.0 mm crochet hook.
You can download the free crochet pattern of the Battenberg Blanket on the website of Cherry Heart.
