Tag says Men's XL but might fit more like today's large. Would fit someone over 6ft with lean to average built. 
Check measurements below. 
 
Hard Crops vintage one piece ski suit in white with blue and neon green accents. Designed for style and function, this suit features plenty of zippered pockets, a blue hood, and zippered legs that guarantee a perfect fit over your ski boots. Perfect for vintage ski enthusiasts seeking both authenticity and practicality. We specialize in vintage ski suit rentals tailored to your needs. Please book an appointment online.
 
Measurements taken across laying flat:
Waist: 22"
Hips: 22"
Inseam: 31"
Torso: 34"
Pit to Pit: 22"
Collar to Cuff: 33"
Total Length: 65"