Measure both standing feet, use the larger length and Mondopoint reference, then verify the exact maker/model chart instead of assuming universal size labels.
A quick decision brief for this specific tool
Standing heel-to-longest-toe length for both feet plus the exact manufacturer/model chart you will verify
The larger-foot measurement, a nearest-5-mm Mondopoint length reference, left/right difference, and retained chart identity
Use the larger of the two measured foot lengths and express it in centimeters, millimeters, and a rounded Mondopoint length reference; do not invent a universal US/UK/EU label
Choose your path
Turn measured lengths of both feet into a larger-foot/Mondopoint lookup starting point while requiring the exact shoe chart and trial fit.
Avoid a false universal US/UK/EU conversion.
Measure both feet standing, retain the larger length, and check the exact maker/model chart.
Chooses try-on candidates from the product chart rather than an invented continuous formula.
Keep current measurement and product fit separate from a remembered size.
Measure both feet now and use the current product’s child chart or trained fitting.
Does not reuse an adult formula or silently add a universal growth allowance.
Start with length but preserve arch and width checks.
Use the larger foot measurement, then measure heel-to-ball and width and trial-fit.
Treats the output as a starting measurement, not a fit guarantee.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
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The two standing heel-to-longest-toe measurements are retained separately and the larger becomes the chart lookup starting length.
Fitting length = max(left length, right length)The fitting length is converted to millimeters and rounded to the nearest 5 mm for a Mondopoint length reference; no hidden toe allowance is added.
Mondopoint reference = round(mm ÷ 5) × 5The result retains the maker/model chart name so the measured length can be reconciled with that product’s size, width, last and try-on behavior.
Updated: August 2026
A shopper measures both feet, records the larger length, then selects candidate sizes only from the named model chart.
A wearer sees the millimeter difference between feet and fits the larger foot rather than averaging the two.
An associate starts from length, then checks heel-to-ball length, width, flex point, heel hold and toe room on the actual shoe.
Measure both feet while standing and use the larger foot as the chart lookup starting point.
Verify the exact maker/model length and width chart and trial-fit the specific shoe.
Shoe labels are not universal conversions. This guide keeps the larger measured foot length and selected chart identity visible, provides a length-based Mondopoint reference, and routes the final decision through the exact shoe chart and trial fit.