shoulder blades
post #14358 post #15677 post #17155
Shoulder blades are the triangular bones on the back of the shoulders, medically known as the scapulae. These are often a clear characteristics of the shape of the back, unless the upper back is hunched by pushing the shoulders forward. Also, in a certain level of cartoonifying, this feature is omitted from an image.
Tag should be used, if even one shoulder blade is clearly indicated/visible in the image.