I made this for one of my cousins. The pattern for the gown is from one of my own
you can find it HERE
I did make adjustments to my pattern to make it to a non burial gown and make it more NB size.
I added 5 extra stitches per arm, I CO when starting with 93 stitches instead of 74 and I took the k 3 from beg and end of row and sewn gown up in back instead of leaving open like you do for burial gowns.