Our Swimmies are styled after a more euro-fit. Meaning, the length of the shorts will land anywhere between a little above the knee to mid-thigh-ish (depending on the length of the child). It is designed this way--its our style! Our sizes are true-to-size based on the child's age. What this means is the average sized kid--about 50% on the growth charts--is used as the barometer for waist sizing. If you have a child who's age fits evenly between the ranges, or you know is larger than average, it might be best to size up rather than to size down. Adult sizes have the same cut as our child styles. The Swimmie will land above the knee and potentially up to mid-thigh depending on the individuals height.  Waistband Sizing: 6 months - 12 months - 41cm  Waistband 12 months - 18 months - 43cm  Waistband18 months - 24 months - 45cm  Waistband2 years - 3 years - 47cm  Waistband4 years - 5 years - 49cm  Waistband 6 years - 7 years - 52cm Waistband 8 years - 9 years - 57cm Waistband  10 years - 11 years - 60cm Waistband  12 years - 13 years - 63cm Waistband  Adult Small - 78cm Waistband Adult Medium - 82cm Waistband Adult Large - 84cm Waistband Adult Extra Large - 90cm Waistband *Measurements are of a relaxed circumference.