Sizes & Fits
Reckonersweight 1reckoner · computes, doesn't store
You are a 42 at home, a 9 in one country, and something entirely mysterious in a third. Sizes & Fits converts sizes between systems — the shoes, the clothes, the fits that every region insists on numbering its own way — so you can order from abroad with reasonable hope. It computes the equivalent and keeps nothing, including any opinions about the sizing itself.
This is not a screenshot. It's the real tool, running right here — go on, put something in it.
Open the demo full-screen: /demos/sizes-fits.html
Questions people ask
How do I convert my shoe size between EU, UK, and US sizing?
Pick the system you know, enter your size, and read off the equivalents. It is a lookup done properly, without opening six contradictory conversion charts in six tabs.
Does the size converter work offline while I'm travelling?
Yes — it is one HTML file that runs in your browser with no connection needed, computes on the spot, and stores nothing. It works in the fitting room of a foreign department store, which is exactly where you will want it.
Will the converted size always fit perfectly?
The conversion gets you to the right number; whether the maker's idea of that number matches your foot is fashion's oldest joke. Treat it as an excellent starting point and read the reviews.
Fits your knife at weight 1. Nothing here is final — Knife follows Life. Reforging within your tier is free, forever. Add it, drop it, reforge later; the file stays yours either way.