I had knit it in 6-12 months using cotton with the hopes that my daughter, who was born in December could wear it in the summer. I used the intarsia method as well so it would be only one layer thick which mean I had a lot of little balls of yarn to deal with. I did cheat and carry the cream over the single stitch of brown. Knitting with cotton hurts my hands so. It didn’t make me very happy that she didn’t fit it until the fall/winter and wore it layered over other shirts.
I remember my daughter was such a placid baby and good sleeper that I was able to do the majority of knitting holding her while she slept in my arms!
The good news is that my son fits clothes within the appropriate age range! He is wearing it today for the first time and I am so happy!