Dandy vintage 1960's light heather gray v-neck sweater vest from Kay Style.

Collar label indicates 'Angora' so it's probably a wool and Angora blend.

Size:  40 (or Medium) 

Chest, armpit to armpit:  20

Waist:  18

Length, center back:  24

Approximately 1" seam at left front arm opening has come loose, not a hole, just the seam (see photo). 

Otherwise good to very good vintage condition with light typical wear.