How to translate gauge into size

[loopieelf]

I am fairly new to knitting and need help in how to determine the finished size by using the gauge. The pattern I'm trying to knit (Breezy Baby Blanket from Pickles) says that 4"=14 stitches using a DK weight yarn and US size 8 needles. Now my math may be way off, but if I am reading it right, according to that and the number of stitches that are cast on (96) the finished width will be 27". They say it will end up at 45". How do I figure all this out?????
I want to make this bigger so need to get it right.

[salmonmac]

Welcome to Knitting Help!
Yes, the cast on of 96sts will give you about 27" in width. I didn't see dimensions given for the finished blanket but several of the knitters on Ravelry increased the cast on (136sts or about 39"). That's a better size for a baby blanket. Any multiple of 10sts + 6sts will work.
http://www.ravelry.com/patterns/libr...y-baby-blanket