Many people consider their waist size to be the leading fitness indicator. If they see a bulging belly, they know they need to start working on their fitness. On the other hand, a retracting waistline is a cause for celebration for overweight folks. “What is the average waist size for women?” or “What is the average waist size for men?” is usually the most common question amongst people who are beginning to take control of their diet and physical fitness. However, contrary to popular opinion, the average waist size might not be the ideal waist size for them. But why is that, you ask?