I am working on a Tom Baker Scarf using this pattern.

http://www.doctorwhoscarf.com/pdf/fullworsted.pdf

It says 3 rows of purple but then at the top it says "measurements in garter ribs (2 rows each). So am I doing 3 rows or 6 rows? I am so confused, I did 3 but then I am looking at the images of the scarf online and it looks so much bigger, is that after blocking. Any help would be great. Thanks.