The first step was getting Picot's measurements:
1. Neck measurement. - Nami wants Picot to have a turtleneck sweater. Because her t-shirts usually end up too stretched out around the neck, I will knit a ribbed neck to keep it fitted on Picot's neck. Nami measured around Picot's neck, where her collar normally sits.
2. Chest Measurement. This measurement should be around the biggest part of the chest. With Picot's hair, Nami got a range of measurements.
3. Chest Length. Nami measured from the neck to the end of Picot's sternum. This will be the length of the sweater as it extends down Picot's belly. You don't want to extend the sweater too far down, to avoid any pee wetting the sweater. (I know, what a lovely thought.)