OntarioCanuck - 1/13/2021 19:35 What you describe are all "about" A metre is 'about' a step or pace too just depends on the persons leg length However the inch etc are still officially determined using SI to say how long they are. BTW did you know that surveyors sometimes use a measure marked in tenths of a foot rather than you base of 12 Also there are more than one 'foot' that has been used to measure things such as the international foot and the surveyors foot. But everyones foot is a different measure so we still need an official measuring tape