shoes, tops, bottoms — and a centimetre under every grid
Built as a memo rather than a table: the thing worth hanging it up for reads across the room, with the full reference in smaller type below it.
Three sizes in one archive — from a sheet on the fridge to a poster on the wall.
Size grids are not standardised between brands: the letter and the number are labels a brand hands out itself. Only one thing here is reliable — the centimetres, and they sit under every row.
A European shoe size steps by the Paris point — two thirds of a centimetre, or 6.67 mm. British and American sizes step by the barleycorn — one third of an inch, or 8.47 mm.
The ratio between the steps is exactly 1.27, that is 127 to 100. The two grids coincide only every 127 European sizes, and on a human foot that never happens once.
So every conversion table is a rounding, and each brand rounds its own way. Centimetres are not rounded: measure your foot in the evening, standing, with weight on it, and take the longer of the two.
Why the numbers can be trusted. Every countable number here is computed from data rather than typed in, and the sheet must pass 6 independent checks before it is allowed to build — how many items there are, the order they come in, and the claim in the highlighted box itself. If one fails, there is no file.
