Make your own fit reference
Lay a well-fitting garment flat without stretching it. For a top, record chest width, shoulder width, body length and sleeve length. For trousers, record waist width, front rise, thigh width and inseam.
Keep the unit beside each number. Use the same measuring method shown in the seller’s diagram so you are comparing the same points.
Do not mix width with circumference
A chart may describe a flat width, while another uses a measurement all the way around the garment. A 55 cm chest width and a 110 cm chest circumference can describe a similar garment. Check the diagram and label before concluding that a row is wildly oversized.
Do not apply that conversion to unrelated measurements. Body length and sleeve length are linear measurements, not values to double.
Read the cut as well as the numbers
Dropped shoulders change where a sleeve measurement begins. A cropped top can have plenty of chest room and still be shorter than you expect. Stretch fabric can fit differently from a woven fabric even when both show the same width.
Choose which measurement matters most for your use. If you are layering under a jacket, the chest and shoulder room may matter more than matching the letter on the label.
For shoes, ask what the centimetres mean
A centimetre figure may describe foot length, an insole or a recommended fit range. Those are not interchangeable. Compare the seller’s definition with a shoe that fits and ask for clarification if the chart does not explain it.
Add the chosen size and its relevant measurements to your saved row. When warehouse photos arrive, you will have a specific reference to check.
Sources & further reading
OfficialPikobuy buying guideReferences reviewed 24 September 2026. Platform terms and listing details can change.