Prism99

Here are some links:
https://www.youtube.com/watch?v=zp8MpA12n04
http://agirlandhertube.blogspot.com/...w-to-make.html
http://www.mamasmiles.com/sewing-tut...nsory-blanket/
http://www.articles.complexchild.com/june2009/00130.pdf
http://www.medscape.com/viewarticle/833673
http://www.nationalautismresourcesbl...langslet-otrl/

The weight of the blanket depends not only on the size of the blanket, but on the size of the child. You want to do some research on the recommended weight (or get a recommendation from a medical professional) before making one.