The noro shawl that never ends.

My noro shawl never ends it keeps growing but is never big enough, being a circle it does need to quite large to be used as a scarf or shawl but i predict that i wont have it finished before Christmas it just seems to be eating up the wool and i think i may need a third ball of yarn meaning it would have taken over 1800 meters of yarn to finish the project.
I have really now been working on it very much at all as one row is so long and takes so long to do, also with Christmas not very long away and im very busy with making christmas presents.