The Pants Are of Standard Size, Just Take It According to the Size of the Usual Pants. Size Reference: Size 28 for about 50.00kg, Size 29 for about 55.00kg, Size 30 for about 60.00kg, Size 31 for about 65.00kg, about 70.00kg, Size 32, 75.00kg, Size 33, 80.00kg, Size 34, 85.00kg, Size 36, 90.00kg, Size 38, 100.00kg, Size 40, 112.50kg, Size 42, 122.50kg, Size 44, about 132.50kg, Size 46, 142.50kg, Size 48, 152.50kg, Size 50, You Can Float 1-Size 2 According to Your Figure! Dear, If You Don't Know What Size to Choose, You Can Send Me Your Height and Weight for Your Reference.