60s Embroidered Turquoise Cardigan, Size M

Super soft and cozy cardigan in the prettiest shade of pale turquoise.  It has very pretty crewel embroidered flowers down the front and little white button closure.  I'm not sure what the fibre content is but I think it is a very fine synthetic or blend.  It is very soft and in great condition.  I think the size would be medium but please check the measurements below and perhaps compare them with a sweater you have in your wardrobe to be sure of the fit.

Chest: 40" laying flat
Across the shoulder: 15"
Sleeve length: 21.5"
Bottom ribbed band: 16" across
Shoulder to hem: 21"
There is quite a bit of stretch in the knit  so it could stretch another 2-3" at each point given.