BagCheck compares the three exterior measurements in the best physical orientation. It does not invent a missing axis label or assume that unknown protrusions are included.
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Evidence
US inches13.5/9/3 retained; exact conversion before display rounding. Do not combine regional rounded dimensions to optimize verdict. Official page re-read through web retrieval 2026-09-07; direct HTTP transport returned 404, not accepted as product evidence. Hardware inclusion unknown; no compression or airline allowance inferred. Evidence: research/overnight-2026-09-07/PATAGONIA_QUALIFICATION.md; target TARGET-30.