Primary rule
RozmiarTo treats general charts as a starting point. ISO 8559-2 explains that clothing size designation is based on body measurements, while finished garment dimensions depend on the designer, cut and garment ease. The exact product chart therefore takes priority.
Footwear and rings
Mondopoint presents foot length in millimetres following the principle of ISO 9407. EU, UK and US conversions remain approximate. For rings, inner circumference or diameter is the key input and a jeweller should confirm the final size.
Matching algorithm
For every chart row, the tool calculates distance from the centre of each range and adds a stronger penalty when a measurement falls outside it. The result shows the best and neighbouring option and the limiting measurement. Confidence describes chart alignment, not guaranteed physical fit.
Sources
- ISO 8559-1:2017
- ISO 8559-2:2017
- ISO 9407:2019
- ISO 19407:2023
- ISO 8653:2016
RozmiarTo does not reproduce the full text of paid standards. It uses their public scope descriptions and transparently documented calculator assumptions.