There are no standard sizes for clothing, which is why each brand has their own unique cut and fit. Please do not presume you are the same size between brands for a similar product. If you have a synthetic insulated jacket that fits correctly, then use it as a template for these measurements.
HOW TO MEASURE
Chest - Measure the full circumference of your chest just below the armpits
Back Length - Measure from the back of your neck to the hem
Sleeve Length - Measure from the centre of the back of the neck, across the shoulder to the sleeve end.
Synthetic Insulated Jackets Fit
These jackets have been designed with a generous but not voluminous fit, allowing the use of base layers and mid layers underneath. Please be aware that these measurements are taken from the garments unstretched, apart from the 'TO FIT CHEST' column, that indicates the range of fit.
The table below shows the garment measurements for Snugpaks synthetic insulated jackets. There is a tolerance of +/- 10mm.
TORRENT JACKET SIZE CHART
SLEEKA ELITE REVERSIBLE JACKET SIZE CHART
ARROWHEAD JACKET SIZE CHART