0-3 Months 18.5" / 47cm Romper Cap Mittens. 3-6 Months 20.5" / 52cm Romper Cap Mittens. 6-9 Months 22.5" / 57cm Romper Cap Mittens. 9-12 Months 24.5" / 62cm Romper CapBib. Perfect sparkly 100% cotton newborn Prince and Princess Crown set includes Jewelled Rhine stone, bow detailed footie, cap and mittens.