25
It depends on age, weight,and height,
Here are some age groups and ideal waist sizes-12: 20-24 or less (UA) or more (TA)12: 24-28 or less (UA) or more (TA)13: 26-30 or less (UA) or more (TA)14: 28-32 or less (UA) or more (TA)15: 30-34 or less (UA) or more (TA)16: 32-36 or less (UA) or more (TA)17: 34-38 or less (UA) or more (TA)18: 36-40 Or less (UA) or more (TA)18+: 38-42 or less (UA) or more (TA)
Legend: UA= under average heightTA= Taller than average height
Here are some age groups and ideal waist sizes-12: 20-24 or less (UA) or more (TA)12: 24-28 or less (UA) or more (TA)13: 26-30 or less (UA) or more (TA)14: 28-32 or less (UA) or more (TA)15: 30-34 or less (UA) or more (TA)16: 32-36 or less (UA) or more (TA)17: 34-38 or less (UA) or more (TA)18: 36-40 Or less (UA) or more (TA)18+: 38-42 or less (UA) or more (TA)
Legend: UA= under average heightTA= Taller than average height