Kooba Kids sizes are aligned with Australian standard sizes.
| Size | 0000 | 000 | 00 | 0 | 1 |
| Age | newborn | 0-3 mths | 3-6 mths | 6-12 mths | 12-18 mths |
| Weight (kg) | 3.5 | 6 | 8 | 10 | 12 |
| Height (cm) | 52 | 62 | 68 | 76 | 84 |
| Body Length (cm) (Neck line to ankle) |
43 | 48 | 54 | 60 | 67 |
| Arm Length (cm) | 25.5 | 30 | 33 | 36.5 | 39 |
| Waist circumference (cm) | 42 | 45 | 51 | 52 | 60 |