What a measurement can do
A foot measurement gives the seller information to compare with the actual size and shape of a shoe. It does not automatically translate into a GUMSHOE size. Size systems, labels, width and the intended fit have to be matched to the specific model.
Use the socks you expect to wear and measure both feet. If standing comfortably is difficult, ask someone to help; do not strain to follow the worksheet.
Make a simple record
- Put a sheet of paper on a level surface against a wall. Use a pencil and a millimetre ruler.
- Stand with your heel gently at the wall, wearing your intended socks.
- Have a helper mark the farthest toe and the widest points without pressing the pencil into the foot.
- Measure from the wall edge to the toe mark in millimetres. Record the widest span separately.
- Repeat on the other foot and repeat the measurement once to check it.
- Send both measurements, your usual labelled size, the size system and any fit preference to the seller.
Use the comparison worksheet
The tool reports the longer measurement and the difference between your feet. It does not recommend a size or add an arbitrary allowance. Values stay in this page and are not sent to a server.
You can enter both repeat measurements to see each foot’s spread. Complete both extra fields or leave both empty. The spread describes only these two entered readings; it is not a shoe size, calibrated error bound or medical judgement.
Example
Left foot: 264 mm. Right foot: 267 mm. The longer measurement is 267 mm and the difference is 3 mm. Give the seller both measurements. Ask how they compare with the fit information for the exact model and size; do not turn 267 mm into an EU number using a chart from another brand.
Check the fit when it is appropriate to try on
- Follow the seller’s indoor try-on and return conditions.
- Check both feet with the intended socks.
- Look for heel movement, toe pressure and pressure at the widest part.
- If fit is uncomfortable, seek a different fit rather than treating pain as a required break-in.
- LEFT / 264 mm: An example measurement, not a size chart.
- RIGHT / 267 mm: Repeat each measurement to check it.
- LONGER / 267 mm: Record the longer foot and both widths.
- DIFFERENCE / 3 mm: Give both measurements to the seller.
Sources & image credits
Original GUMSHOE photography and project images retain their source credits. New diagrams are original explanatory work.
Add a width record without inventing a shoe size
The length comparison above does not compare widths. Keep a separate width record for each foot rather than squeezing a second measurement into a length field. Measure the foot’s widest forefoot span; a shoe’s external outsole width is a different quantity.
- Use the same socks, stance and millimetre ruler as in the length procedure. Mark the widest points without pressing the pencil into the foot.
- Record both feet and repeat once. Keep the two readings when they differ; do not quietly choose the smaller number.
- Describe where pressure is felt during an authorized indoor try-on. Ask the seller for information about the exact model and size; do not convert the width into a size using another brand’s chart.
Fictional record: left length 264 mm, widths 99 and 100 mm; right length 267 mm, widths 103 and 103 mm. The right foot is longer and its recorded span is wider. The left repeat spread is 1 mm. That spread is not a calibrated measurement error, recommended clearance or a medical finding. Neither 100 nor 103 mm establishes a GUMSHOE size.
Send: date __; socks __; left length/width readings __; right length/width readings __; current size system __; exact model requested __; fit question __. Example question: “Which model information can you compare with these measurements, and what indoor try-on conditions apply?” The record supports an enquiry; it does not confirm stock, a size reservation or a purchase.
Source: gumshoe.amsterdam.