Size Charts
Children's Sizing
| Size | Height | Waist |
| 0-3m | 60cm | 43cm |
| 3-6m | 69cm | 45cm |
| 6-12m | 75cm | 48cm |
| Age 1 | 83cm | 50cm |
| Age 2 | 90cm | 51cm |
| Age 3 | 97cm | 52cm |
| Age 4 | 103cm | 53cm |
| Age 5 | 109cm | 55cm |
| Age 6 | 115cm | 57cm |
| Age 7 | 121cm | 59cm |
| Age 8 | 127cm | 61cm |
| Age 9 | 133cm | 62cm |
| Age 10 | 140cm | 63cm |
| Age 11 | 146cm | 64cm |
| Age 12 | 152cm | 65cm |
Women's Sizing (Wonder Undies)
| Size | Waist | Hips |
| XXS | 61cm-66cm | 84cm-89cm |
| XS | 66cm-71cm | 89cm-94cm |
| S | 71cm-76cm | 94cm-99cm |
| M | 76cm-81cm | 99cm-104cm |
| L | 81cm-86cm | 104cm-110cm |
| XL | 86cm-91cm | 110cm-117cm |
| XXL | 91cm-99cm | 117cm-125cm |
| 3XL | 99cm-110cm | 125cm-132cm |
| 4XL | 110cm-119cm | 132cm-140cm |
| 5XL | 119cm-127cm | 140cm-145cm |
Men's Sizing
| Size | Chest | Waist | Hips |
| XXS | 76cm-89cm | 63cm-71cm | 74cm-81cm |
| XS | 84cm-91cm | 71cm-79cm | 81cm-89cm |
| S | 91cm-99cm | 79cm-84cm | 89cm-97cm |
| M | 99cm-104cm | 84cm-89cm | 97cm-104cm |
| L | 104cm-110cm | 89cm-97cm | 104cm-112cm |
| XL | 110cm-117cm | 97cm-102cm | 112cm-119cm |
| XXL | 117cm-122cm | 102cm-109cm | 119cm-127cm |
| 3XL | 122cm-127cm | 109cm-117cm | 127cm-135cm |
| 4XL | 127cm-132cm | 117cm-125cm | 135cm-142cm |
| 5XL | 132cm-138cm | 125cm-135cm | 142cm-152cm |