Waist beads are commonly used to gauge changes in weight. Rather than step on a scale, people can use waist beads to stay aware of any weight gain or loss in the abdomen.
Waist beads don’t stretch. If you were to gain weight, the beads will sit higher on the waist or feel tight. Conversely, if you were to lose weight, the beads will feel loose and fall further down to the hips.