Vintage handmade 3 piece sweater &matching cap and booties, 3- 6months ??

Vintage handmade 3 piece sweater with matching cap and booties, 3-6 months ?? Maybe less? Beautifully knitted yellow sweater, cap and mitts Pit to pit is 9inches Length is 9 inches Excellent condition!! Looks like brand new! Has been kept in a cedar chest since 1970 I do not have kids, so hard for me to estimate the size