Originally Posted by Oso Polar

Anyway, they recommend to add 5 mm to the measured foot length, not to the width. I don't think that even if feet swell they become noticeably longer. So, I just measured the feet as they say and then selected the size with matching length range. It also matched the feet width I've measured in standard width: 104 mm for size 45 - I've measured 103 for one foot and 105 for another. Wide shoes at the same size 45 are listed as 116 mm wide - this would have been way too wide.