Chest: Measure chest just under arms and across shoulder blades, holding the tape level ( hold your breath). Be sure to cross over the shoulder blades and at the fullest part of your chest. We offer RFD delivery as an alternative to our normal Airgun Home Delivery service. With our comprehensive network of RFD’s located throughout England, Scotland and Wales, we can deliver your gun to them, allowing you to collect at your convenience. Sleeve Length: - Outer seam: You'll need assistance for this one, however this is the most accurate way to measure sleeve length. See help notes *(a) A good quality zip with storm flaps is a good option. Velcro flap for extra protection will help protect from direct rain & wind, however weatherproof zips will give you the best protection.