A correctly fitted LAUMA Medical Elastic Belt Extra should wrap firmly around the waist and give an even feeling of compression over the lower back and lower abdomen. The purpose is to add a sense of stability to the lumbar area, not to squeeze the body as tightly as possible. When fitted well, you should still be able to breathe normally, sit down, bend slightly and move without sharp pressure points.
Size 4 refers to a specific waist circumference range, so it is important to compare your measurement with the manufacturer’s size chart before use. Measure around the waist area where the belt will actually sit, rather than relying only on clothing size. If the belt is too loose, it may move around and will not provide enough compression. If it is too tight, it can feel restrictive, press into the abdomen or make longer wear uncomfortable.
After putting it on, check that the fabric lies flat and that the pressure feels balanced rather than concentrated in one narrow area. During physical effort, the belt should help you notice your posture and keep the lower back feeling more supported. If you feel numbness, breathing restriction, increasing discomfort or unusual pressure, remove it and refit it more gently.