Start with a shirt that fits.
Place a suitable shirt flat on a level surface. Compare its dimensions with a confirmed chart for the product you are considering. Keep the measurement method consistent; a flat width and a body circumference are different measurements.
| Measurement | How to record it | Confirm with the supplier |
|---|---|---|
| Chest width | Measure flat across the agreed underarm points. | Exact starting points and whether the value is flat or circumference. |
| Body length | Measure from the agreed shoulder or neckline point to the hem. | Whether the front and back length differ. |
| Sleeve | Use the method appropriate to set-in or raglan construction. | The diagram and reference points used by the chart. |
| Tolerance | Record the agreed variation, if any. | The actual tolerance for the selected product. |
No centimeter values have been invented. Sample S–2XL labels in the catalog are illustrative. Add the verified chart to each product once measurements and availability are confirmed.
Keep a separate chart for each version.
Do not assume the same letter size has the same dimensions across fan and player versions, designs or seasons. Keep the source and revision date of each chart with the product record.
For mixed orders, verify the size total for every design. If two customers want the same shirt in different fits, record their measurement needs separately instead of assigning a size based on age or height alone.