Knitted Doll Dress

I made a knitted dress for Miss M's American Girl Doll.  She had asked me to pretty please make her one and I just had to oblige.  I found a simple enough pattern on Ravelry but it turned out so short!  I had to add quite a few rows to get it half way to the doll's knee.  I used a size bigger on the needles so maybe that was the problem.  Miss M liked it well enough though.