Have you heard of this one. It takes into account the importance of not having belly fat (predisposer to diabetes, etc.) Measure your hips/butt circumference at the widest point. Then measure your abdominal (belly) circumference at the widest pont. For males if your belly circumference is greater than your hips, it's trouble. For women, their belly needs to be equal to or less than 85% of their hip circumference.