Details, Size & Fit. The Cobalt Mod Jacket by Jack London is always a popular move in The Spring Time. A timeless classic, this mod-fit Jacket is perfect for both The races, and The office. Our Model wears a size 50. He is 6’2’’ (189cm) tall, with a 77.5cm waist and 104cm chest. Two button closure Notch lapel Straight flap pockets Welt chest pocket 4 mock buttons at cuff Double back vent Lapel button hole Dry Clean Only.Material: 50% Wool, 47% Polyester, 3% Lycra.SKU: JA108AA36YMD.