I have used the conversion chart for both adult and childrens shoe sizes and found it is superb for comparing the true UK and EU sizes This means I have bough shoes with just EU sizes blind on many occasions and got the right size However the foot size which goes along with this scale seems way out Both my wife and I measure about mm on that scale but need sizes indicated for mm feet  I understand that shoes need to be bigger than the feet they are intended for but the chart implies that absolute feet measurements translate into sizes directly If people measure their feet and followed this conversion chart they would buy shoes that were too small This is explained partially in the article albeit for childrens feet Example A childs foot that is  millimetres  in long requires a shoe that is about  millimetres  in longer The inner length of  millimetres  in is EU shoe size  or UK size  But surely it would be better to change the comparative scale to allow for this and explain that