I use a 36 inch square for the receiving blankets I make. I do round the corners so I can crochet around the edges. In fact I finished up the last of my flannel fabric -- I have about 50 receiving blankets crocheted for my grandkids. They will get blankets when they start having babies. When I make a baby blanket I usually make them 45 inches square. They are intended to drag around rather than be on the bed.