Read units, precision and missing measurements

A measurement is useful only when its unit and scope are clear. Keep the source value alongside any conversion so comparisons do not conceal uncertainty.

Label what was measured

Write whether height includes the head, footwear or support, and whether weight describes the body, assembled configuration or parcel. Separate centimeters from inches and kilograms from pounds. For arithmetic, 1 inch equals 2.54 cm; a conversion does not make the original measurement more precise or prove that two listings measured the same configuration.

Keep unknown values visible

An empty weight field is not zero and is not evidence of a lighter product. A rounded catalog value should not become a supposedly exact specification after conversion. If two sources disagree, retain both values with dates and ask for the selected configuration; do not silently average them.

Working checklist

• Record original number, unit and measurement scope.
• Label any converted value and its rounding.
• Keep conflicting or missing fields unresolved.

Decision point

Compare products only after the relevant measurement scopes match. If handling depends on a missing weight or package size, obtain that information before making a choice.

Use the instructions and written seller answers for the exact configuration. This editorial guide organizes checks; it does not report hands-on testing or a purchase experience.