How to measure men's sizes:
Chest: With arms relaxed at sides, measure directly under your armpits and around the fullest part of your chest and shoulder blades. Keep tape measure parallel to the floor.
Waist: Measure across your natural waist, at the point where you usually wear your pants. Keep tape measure comfortably loose and parallel to the floor.
Men's sizing guidelines:
Men's slippers size guidelines:
Disneyland Paris men's guidelines: