Convert Stock Wrist Strap To An Adjustable Wrist Strap

This is made of soft neoprene, a synthetic rubber, and was what I had on hand.  It's very snug and will not slip unless you move it yourself.  I tried one of the adjustable straps but it was too long and tried another one that had the quick disconnect but it wasn't that secure and the one I had, could be pulled off very easy just by tugging on it.  I want something that's not going anywhere.  This strap comes with the camera and cost very little and does as good a job.