Yellow Baby Blanket: It's just a huge granny square, using my favorite granny square pattern. 20 rounds of 2 rows of color. Then single crocheted all around the blanket with in each corner. The finished blanket measures about 22 inches square.
This crochet size and weight infographic details all the different yarn weights and the specifics of each. It breaks down the yarn type, weight, wraps per inch and ply. This infographic also includes a chart of different crochet hook sizes.