The clavicle, or collarbone, is a slender, S-shaped long bone approximately 6 inches (15 cm) long that serves as a strut between the shoulder blade and the sternum (
Should my collarbone be horizontal?
If your clavicles don't appear to be horizontal or near parallel with the ground, you likely have some tightness pulling your clavicles out of alignment. The more angled one or more clavicle is, the more out of alignment it is.
Should collarbones be parallel to the ground?
Your collarbones "should" be parallel to the floor, and ideally, would be symmetrical. ... As I mentioned in last week's shoulder 101 posting, the collarbone, or clavicle, is one of the three bones of the shoulder joint.