Patagonia's Japan Website (Patagonia.JP) provides Garment Measurements that are Omitted on the USA Website. They aren't exact measurements (there's a disclaimer) but the measurements are close and can be helpful for sizing. :
Patagonia Fishing Clothing Size Guide
Custom Patagonia Down Filled Winter Jackets | Elevation Sports
Patagonia Sizing Guide: Accurate 2024 Size Charts & How It Fits