Pattern can be found here : http://seatrailgrandmas.blogspot.co.za/2009/01/preemie-an...

I wanted to upsize the pattern and my measurements are : chest 19 inches; length 10 inches; underarm to cuff 5.25 inches

Modification :
Cast on 55 sts

Buttonholes made on rows : 6, 20, 34, 48
Made buttonholes on both ends as i wasnt sure if it would be for a girl or boy.

these are the only changes that i made and off course the stitch count would differ (see below)
Row 8 : stitch count 78 sts
Row 12 : stitch count 98 sts
Row 16 : stitch count 118 sts
Row 20 : stitch count 138 sts
Row 24: stitch count 157 sts
Row 28: stitch count 179 sts
Row 32: stitch count 184 sts
Row 44: split of stitches front 31sts, sleeves 34 sts, back 54 sts, sleeves 34 sts, front 31 sts

Sleeves: did 32 rounds of knit before i started the decreasing as stated in the pattern