S size. Certain you will need some force, but this is because of The reality that the fast regulate buckle is held in position by friction. This could be the weak point to somebody but I have discovered this for being of no difficulties for me, the sling hasn't missed https://paxtonbqkzq.arwebo.com/57201709/new-step-by-step-map-for-blue-force-gear-vickers