Size 3 is not a universal clothing size and does not correspond to a fixed waist measurement across all brands. The fit of this Toros abdominal belt depends on your current measurement around the abdomen, taken at the level where the belt will sit, usually around the navel or the widest part of the abdomen. Use a flexible measuring tape, keep it snug but not tight, and breathe normally while measuring. Then compare that number with the Toros size chart on the product page or packaging. The belt should feel snug but not restrictive: it should hold the abdominal area without digging in, sliding down, or leaving deep marks. If your measurement falls between two sizes, general practice is to go with the larger size for comfort, especially if you expect bloating or a changing waistline postpartum, but the brand chart is the final reference. Because the belt has rigid ribs, a too-small size may press on the ribs or edges and become uncomfortable, while a too-large size will not give the even hold the design is meant to provide. It is better to measure in the morning and again later in the day if your waist tends to change, then choose a size that works for your usual state. If you are between sizes and still unsure, a physiotherapist or a well-informed shop assistant can help you decide.