The Company’s sizes description for these pyjamases are stated below. However, the ones that overlap with a higher age are children bigger than their ages :
Size 24: 18+ yearsSize 22:  16-17 years Size 20:  15-16years Size 18:  13-14yearsSize 16: 11-12yearSize   14: 9-10 years+Size12 ;   8-9years: size 10; 6-7 years Size   8: 4-5 years Size   4: 3 years Size 3:  2 year Size 2  : 1 year  size 1 0-1years