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.
Everything else is sort of an average that seems about right. Crib blankets & receiving blankets seem to have the biggest variances - there's pretty much every size possible available. I listed the most prevalent. Mattress depths vary widely be manufacturer. Measure the depth of the mattress before designing the blanket/quilt/comforter.