I will be honest I haven't really looked at the site much so I may just not have looked in the right place. I am new here and see some posts that say like 18 stones and 15 stones and things like that... what is a stone?
The stone is a unit of weight. It is part of the Imperial system of weights and measures used in the British Isles, and formerly used in most Commonwealth countries. It is equal to 14 avoirdupois pounds, which is equivalent to approximately 62.3 Newtons, or about 6.35 kilograms (a unit of mass, not weight).