This is big. Designed to go on top of all your other layers. The label just says 54-56. When laid flat the arm pit to arm pit measurement is 33 inches, with lots of underarm material, as a snow smock should have.
The trouser waist has a draw string cord and is elasticated. Stretches from 14 to 27 inches. [So 28" waist up to 54" waist] Ankles also, elasticated. Double flap of material behind buttons on chest.
Its very well made, stitching etc. The elasticated waists, cuffs and ankles mean it'll fit a lot of different sized people. No fiddly bits, its easy to get on quickly then off.
It'd be good for wet snow, as its a lightweight waterproof material, say wildlife watching in Scotland etc. But its a tough modern material.
It seems a lot better quality and design than the other snow oversuits Ive seen.