The pattern I have is a 14 1/2 but ... flat pattern measurements and a tissue fit indicates that this 37" bust pattern will fit my 39" bust nicely. The french dart did end just above my bust apex (NOT a good look!) so I added 1" to the front bodice between the bottom of the key hole and ABOVE the underarm seam. I did it here because with the tissue fit, I could see that the armhole would be tight. I have to face it, I have muscular shoulders and guns LOL! I expect that these vintage patterns, especially petite one's, weren't drafted with this non feminine trait (which I LOVE about myself by the way) in mind.
I intend to first make this pattern up as a blouse. I am going to leave the key hole open and add ties to the top (sort of mimicking the Colette Sencha I suppose). I am hoping this will eliminate any need for closures in the back. The back bodice conveniently had the center back marked so converting it from a wrap won't be a problem. I may or may not dart the back waist as indicated, I'll wait until the blouse is assembled before I decide. I also may rotate the french dart on the front bodice down to the waist and not sew it?!? Not really sure. I like my blouses to blouse. The blouse will be worn tucked into skirts and high waisted pants.
If this modified pattern turns out to be as nice as I hope. I'll try to make about a dozen or so of these in all types of fabric. This is pretty much the perfect style for me. I am ALWAYS hot and so a short sleeved, loose fitting blouse is the way to go for church etc. I can always add a cardigan when I get cold.