Your subject appears to be wonderfully petite but not frail, just like my wife. Also like my wife, she is able to wear an outfit with some volume without being overwhelmed by it. When done right, as here, the small woman/big clothes contrast is very effective. Accessories are also important, and this subject’s are just right in scale and number. Not a criticism of your subject’s choice, but my wife would go funkier than the Birkenstockish sandals for footwear; probably Fluvogs or Cydwoqs (we’re not connected in any way with these brands, other than to tithe to them regularly).