Recent recommendations, based on reputable research, list the range for dietary protein to be from 10-30 grams of protein per kilogram body weight per day.
Here's the site I use for blanket sizes-about half way down page in bold type: http://knitting.about.com/od/knittingskills/a/blanket_sizes.htm. Says standard baby blanket size is 45x60 inches. When I've made baby blankets, I've made them closer to the actual crib size (28x52), because you don't need them to drape over the sides like a regular blanket.
I'm not sure there is a standard size for baby blankets, to be honest! Here's the thing: babies come in all sizes and use blankets for a variety of things, so lots of different sizes are generally useful. About the smallest I'd go for a baby blanket is probably 28 square. It seems small, but this size can be good for car seats and strollers...