AAMI Jacket

Here's how to measure yourself:

Chest

Wrap the tape around the widest part of your chest and across your shoulder blades.
Let your arms hang loose. Don't hold them out.

Length

Start at the highest point of your shoulder, where it meets your neck. Drop the measuring tape straight down the center front to the hem. Keep it flat and snug, not tight.

Hip

Wrap the tape around the widest part of your hips. That's usually right around your butt.

One tip: keep the tape snug, not loose. This jacket is meant to fit close to the body, so if you measure loose, it'll end up too big.
Don't stress if your numbers don't land exactly on the size chart. The fabric has good stretch, so it moves with different shapes and bodies.