YARN, GAUGE, SIZE AND MACHINE  Make this on any bulky or mid-gauge machine. Sizes are for small babies. The finished vest  size is 18, 19, 20” to fit  newborn, 3 month, 6 month babies. Lengths  are 8, 9, 10”. Armhole depth is 3, 3.25, 3.5” Use any of the many worsted weight yarns on  a bulky or mid-gauge machine that gets 4 stitches/6 rows/inch. In this case rows create  garment width and stitches length. Therefore if you desire to add length, add stitches