Looks like a small repair on the sleeve

Chest Size: 39" | Estimated Size: Medium Slim - Label suggests a chest around 97cm

Sleeve Length: 28" / X Long

so makes for a good repair project

Collar to Hem: 33

British RAF MK3 FR Cold Weather Aircrew Trousers - W32 L32.5 Pullover Looks like a small repairAt a glance Fire Resistant Outer Shell Material w Waterproofing Quality Manufacturing Button & Zipper Closure Built In Adjustable Suspenders Various Pockets Heavy Duty Durable Velcro Adjustable Belt Gore tex Inner Lining Thermal Cold Weather Zipper Calves Manufactured by Ballyclare Solid Olive Green Colour Waistband Flat: 17" Suggested Size: Small Regular Label reads "SIZE 7" and recommends a waist from 76 86cm Inside Leg Length: 32. 5" Long Label