Size 0-18 months.
Mittens is 7'' / 18cm in length;
Balaclava is 12.2'' / 31cm in length and 7.1'' / 18 cm in width;
Size 1-3 years.
Balaclava is 14'' / 34cm in length and 8'' / 20cm in width;
Mittens is 8.7'' / 22cm in length.
Size refers to garment dimensions, not body measurements.