— TECHNICAL RESEARCH DATA
Measure the Foot
Record the Seller Size Chart
Compare the Insole Evidence
Make a Human Size Decision
Measure both feet while standing. Record left and right length and width in millimetres, socks and date. Use the larger foot; missing fields stay Unknown.
Save the seller’s chart URL, capture date, size system and units. Copy the exact EU, US, UK, CN or centimetre mapping without silently converting it.
If a clear QC ruler photo exists, record the measured insole length and photo date. Mark unclear angles, hidden ruler ends or missing removable insoles as Unknown.
Compare foot length, seller chart and insole evidence, then record the chosen size and reason. This is a human decision for one listing; it does not guarantee fit, product quality or seller reliability.
