Two size charts for one item, side by side
Find out whether two size charts for the same item actually disagree, and which size sits closest to your own measurements.
Size chart comparison result
The two charts disagree on 20 of 20 compared cells.
The two charts disagree on 20 cell(s). Where they conflict, trust the one whose steps between sizes are even: it covers the same number of cells, so the tie goes to the chart whose numbers scale evenly.
| Size | Measurement | Chart A | Chart B | Δ (A − B) | Reading |
|---|---|---|---|---|---|
| S | Chest | 96.00 | 99.00 | -3.00 | B is larger |
| S | Length | 66.00 | 69.00 | -3.00 | B is larger |
| S | Shoulder | 43.00 | 46.00 | -3.00 | B is larger |
| S | Sleeve | 60.00 | 63.00 | -3.00 | B is larger |
| M | Chest | 100.00 | 103.00 | -3.00 | B is larger |
| M | Length | 68.00 | 71.00 | -3.00 | B is larger |
| M | Shoulder | 44.00 | 47.00 | -3.00 | B is larger |
| M | Sleeve | 61.00 | 64.00 | -3.00 | B is larger |
| L | Chest | 104.00 | 107.00 | -3.00 | B is larger |
| L | Length | 70.00 | 73.00 | -3.00 | B is larger |
| L | Shoulder | 45.00 | 48.00 | -3.00 | B is larger |
| L | Sleeve | 62.00 | 65.00 | -3.00 | B is larger |
| XL | Chest | 108.00 | 111.00 | -3.00 | B is larger |
| XL | Length | 72.00 | 75.00 | -3.00 | B is larger |
| XL | Shoulder | 46.00 | 49.00 | -3.00 | B is larger |
| XL | Sleeve | 63.00 | 66.00 | -3.00 | B is larger |
| XXL | Chest | 112.00 | 115.00 | -3.00 | B is larger |
| XXL | Length | 74.00 | 77.00 | -3.00 | B is larger |
| XXL | Shoulder | 47.00 | 50.00 | -3.00 | B is larger |
| XXL | Sleeve | 64.00 | 67.00 | -3.00 | B is larger |
20 cell(s) differ by more than 2.00 cm. Cells in the warning colour are the ones to read first: they are where the two charts describe different garments.
How the calculation runs
Parameters and the date they were checked
Parameters checked 2026-10-06. The defaults on this page are the values we recorded when we last read the relevant pages, and they are listed with the same date on the sources page. Change any rate, fee or day count and the tool labels itself manual, so a figure you supplied is never mistaken for one we recorded.
Three ways to use it
- Enter the two charts in the order they appear on the item page; which one is A and which is B does not change the flags, only the sign of each difference.
- Keep the tolerance at 2 cm for garments and raise it to 3 cm for knitwear or anything measured flat, where a centimetre of stretch is normal.
- Fill in your own four measurements only if you took them over the same kind of clothing; a chest measurement taken over a jacket will push the recommendation one size up.
Questions this tool gets
Which chart should I trust when they disagree?
The one that covers more of the four measurements, and within that, the one whose numbers move in even steps from size to size. A chart with gaps or with jumps that do not scale is usually a copy of another item’s chart. The tool prints that verdict when a disagreement passes your tolerance.
Why does it say the two charts are different systems?
Because the size labels do not match and no measurement overlaps between them, which is what happens when one chart uses letter sizes and the other uses numeric ones. That is not a contradiction to resolve on this page: the size a seller means by 46 is not something arithmetic can recover, so it has to be confirmed on the item page.
Where it stops being reliable
Boundaries and exceptions
- Measurements must be positive numbers; a zero or a blank is rejected rather than treated as missing.
- A size label that appears in one chart and not the other is not matched up automatically, and the recommendation only covers sizes present in chart A.
- A recommendation needs all four of your measurements. Two or three are reported as a partial profile instead of a size.
- The tolerance applies to the gap between the two charts, not to how a garment will fit you: a chart that agrees with itself can still be wrong about the body.
Stops that use this number
- Stop 2: Hand the link over — A link carries an identity, not a product. Keep the identity intact and the order stays traceable.
- Stop 5: QC photos — A photo set is evidence of coverage, not a verdict on quality. Ask for angles, not for opinions.
Readings behind it
- Why two size charts for the same item disagree — Two charts sharing a base size agree exactly there and drift by the step difference above it.
- Joyagoo multi-variant rows: 26 of 192 listings — A multi-variant row describes a range of designs; it does not promise which unit you receive.
Other tools: all nine. The reading protocol and the cost waterfall are the two tools that exist only on this site.