They also use the old British size charts

Quality 86% Wool & 14% Polyester Blend Material

Wire Frame Hood

Chest Size: 44" | Suggested Size: Medium Slim - Label suggests a chest around "94"cm

you have velcro closures on either hip as well as each trouser cuff

British RAF PTI Vest - Medium 92cm Olive Drab They also use the oldAt a glance 100% Cotton Material PTI Patch Great Retro Style Vest Design White w Light Blue Edging Chest Size: 40" Estimated Size: Medium Regular Label suggests a chest around 92cm Collar to Hem: 26" Modern Militaria Issued Mid 1990's Genuine British Army Surplus MOD Surplus Grades Grade 1 Good condition, some prior use but over all in great shape. Some ever so faint markings from prior use, but certainly ready for much more wear. Any questions please