This vintage pattern is made available by Free Vintage Crochet.
Crochet this bedspread to any size that you need. The pattern does not provide a stitch multiple, but it does provide instructions on how to work around that to make this the width that you want.
The stitch pattern is very similar to the granny stitch. And likewise, you can use this in just about any crochet project that you like.
And with that you can basically turn this into any blanket size using any yarn and hook size.