For optimum comfort and safety, it is important to have the right size of sling. A sling in a too small size may provide too less support and can become uncomfortable for the user. For example, it can cut into the groin or risk that the hanger bar comes to close to the user’s head.
With an oversized sling it can be a risk for the user of sliding out of the sling since the opening can become too large.
A sling that is too low or short can provide too little support in the back or neck and can therefore be a security risk. This also means less comfort for the user.
To make it easy to see what size sling has, they have a color mark that varies depending on the size.