Product Advantages The concave-convex support belt reduces the pressure on the back and spine of pregnant women, reduces the vibration of activities, and stabilizes the fetal position. The inner strap should be attached around the lower abdomen, and there is enough space to stick it; the outer strap protects the waist, pull the Velcro on both sides, and stick it to the inner strap. Adjustable Features Breathable Comfort Waistband for Pregnant Women - Don't worry about the sweat, friction, and unbearable pressure most belly waistbands cause. Our pregnancy support waist keeps you cool, comfortable and fully mobile, and you can easily adjust it. Portfolio Features Stitched elastic back support with further support straps on the back. Consists of three components, stable triangular structure, adjustable range size. Suitable for people before and after pregnancy. Pregnancy support belts are mainly to help pregnant women hold up their abdomens. It is helpful for those who feel that their stomachs are larger and need to support their stomachs with their hands when walking, especially the ligaments that connect the pelvis are loose. For pregnant women with pain, abdominal support straps can support the back. Measurements: Measure the circumference of your lower back and abdomen (slightly above your pubic area) Material: 76% Polyester, 24% Elastane Size: Choose your size in centimeters according to your belly diameter. *Please note that the trimester you are in will determine the belt size you will need. Belt Size: Lower Abdominal Diameter Medium: 27.5-39.3 inches Large: 31.4-43.3 inches Extra Large: 35.4-47.2 inches XX-Large: 39.3-51.1 inches