VERY cute set! The coat zipper will need to be replaced.
The tag which had the size was damaged, so the measurements are pictured and listed below. This appears to be a typical Women's size Medium?
COAT:
Top to bottom 22.5"
Armpit to Armpit 23"
Sleeve 25"
BIB:
Inside Seam 29"
Outside Seam (top of bib to bottom) 44"
Top of Bib (sits apx at chest) 16.5"
Length of zipper 14"
Waist (apx) 18.5"