From that particular company I would go over to their "wool" tab and select either WRCH-408 or WRCH-411. These are in what they call blanket weight. One is striped and one a plaid. At 60" wide joining is a bit problematic. You will want a finished piece about 5 or 6 ft square.

Personally I would be looking for a boiled or Melton wool Army blanket in Full size (72" x 90") or Queen size (90" x 100").