FINAL SALE AND SOLD AS IS
The bust is measured from underarm seam to the underarm seam across the front ( double to get the circumference).  The length is measured from the shoulder seam straight down to the hem in both the front and back.  
3: Bust is 22.5" (45" around), Length is 46"
4: Bust is 23.5" (47" around), Length is 47"
6: Bust is 25" (50" around), Length is 48"