The quick answer
Measure both feet while standing, preferably near the end of the day, and use the larger measurement. Record foot length and width in centimeters, then compare them with the specific product’s size chart. Do not rely only on a general conversion from US or UK sizing because fit varies by brand, last, toe shape, lining and construction.
For custom sizes such as EU 45 or 46, confirm the foot measurements, usual size, sock thickness, foot width and whether the item is made to order before payment.
Why your usual size is not enough
EU sizes are useful labels, but they do not guarantee identical internal dimensions across every shoe. Two pairs marked EU 42 can feel different because one has a narrow pointed toe, another has a rounded toe box, and a third uses thicker lining.
Leather can soften with wear, but it should not be expected to correct a major size error. A shoe that is too short can press the toes even if the upper stretches slightly. A shoe that is too wide may slip at the heel and crease excessively.
The most reliable approach is to combine your usual size with actual foot measurements and the product-specific chart.
How to measure foot length
Place a sheet of paper on a hard floor with one edge against a wall. Wear the type of socks you plan to use with the shoes. Stand naturally with your heel gently touching the wall and your weight distributed across both feet.
Mark the end of the longest toe. Some people have a longer second toe, so do not assume the big toe is always the reference point. Measure the straight distance from the wall edge to the mark in centimeters.
Repeat the process for the other foot. Small differences are common. Use the larger foot when choosing a size unless a specialist has advised otherwise.
How to measure width
While standing, identify the widest part across the ball of the foot. Mark both sides and measure the distance. Record whether you often find standard shoes tight at the forefoot, whether you have a high instep and whether your heel is relatively narrow.
Width information is especially important for custom orders and structured shoes. A longer size may provide more width, but it can also create excessive length and heel movement. When the seller offers a wide option or can advise on the last, share the actual width rather than simply saying your feet are “wide.”
Allowance and fit by shoe type
A comfortable shoe needs some space in front of the longest toe, but the amount depends on the style. Sneakers and walking shoes generally need enough room for the foot to expand during movement. Pointed shoes may look longer externally while offering less usable toe space. Loafers should hold the heel securely without crushing the toes.
The foot should not slide forward with every step. The widest part of the foot should align with the widest part of the shoe. Mild heel movement can occur in some new shoes, but strong slipping usually indicates an unsuitable size, shape or volume.
When a product chart lists insole length, ask whether it refers to the removable insole, the internal usable length or an external measurement. These are not interchangeable.
Measure at the right time
Feet can become slightly larger after walking, standing, heat or long travel. Measuring near the end of a normal day usually gives a more practical result than measuring immediately after waking.
Do not measure when the feet are unusually swollen due to injury or a medical issue. If you have persistent swelling, pain, numbness or a known foot condition, seek advice from a qualified health professional before choosing footwear based only on an online guide.
What to confirm for EU 45 or 46 custom sizes
Custom or made-to-order sizes may require additional production time and may have different exchange or cancellation conditions. Before ordering, confirm that the selected model can be produced in the requested size.
Provide foot length, foot width, usual EU size, the size of a well-fitting reference pair, intended sock thickness and any common fit issue such as a high instep. Ask whether the custom size follows the standard model proportions or uses a different last.
Request written confirmation of the selected size and estimated production time. Because custom items are prepared specifically for the order, it is important to settle measurements before production begins.
Common measurement mistakes
Do not trace the foot while sitting because it may be shorter and narrower without full body weight. Do not use a soft carpet. Do not measure only one foot. Do not add a large amount to the foot length without checking the seller’s chart. Do not assume EU 45 from one model will fit exactly like EU 45 in another.
Also check whether the listing uses men’s, women’s or unisex sizing and whether the displayed conversion chart is intended for that exact model.
Use a well-fitting pair as a reference
Choose a pair with a similar style and toe shape that already fits well. Note its labeled size, measure the removable insole if possible, and compare the outsole shape with the product you want to order.
A reference sneaker is more useful for another sneaker than for a pointed loafer or high heel. Share the model type and any fit notes, such as “secure at the heel but with comfortable toe room.” This gives the seller context that a number alone cannot provide.
A simple order message
A clear message can prevent confusion: “My right foot is 28.6 cm long and 10.7 cm wide; my left foot is 28.3 cm long. I normally wear EU 45 in leather sneakers with medium socks. Is EU 45 suitable for this model, or should I use the custom-size option?”
This gives the product adviser enough information to compare the measurements with the actual shoe.
Check the fit carefully after delivery
Try the shoes indoors on a clean surface with the socks you intend to wear. Stand, walk and check whether the toes have space, the widest part of the foot aligns with the shoe and the heel remains reasonably secure.
Do not assume significant pain will disappear after break-in. Mild stiffness can soften, but strong toe pressure, numbness or repeated heel slipping suggests the size or shape is unsuitable. Keep packaging and follow the seller’s exchange instructions until the fit is confirmed.
Keep your measurements for future orders
Save the date, foot length, width, sock type and the final size that worked. Feet and fit preferences can change, so remeasure periodically, but a written record makes future comparisons faster. Note which toe shapes and lasts feel comfortable rather than relying only on the EU number.
Frequently asked questions
Should I choose size based on the larger foot?
Yes, in most cases use the larger foot and adjust the smaller side with lacing, an insole or professional fitting advice when necessary.
Is EU sizing the same for every brand?
No. The label may be the same, but internal length, width and toe shape can vary.
Can I measure an existing insole instead of my foot?
It can be a useful reference, but only when the insole is removable and fits well. Confirm how the seller measures its chart.
Are EU 45 and 46 always custom sizes?
No. Availability depends on the model and seller. Some models stock them, while others require made-to-order production.
Need help choosing?
Send your foot length, width, usual EU size and preferred model to support. For EU 45 or 46, ask whether the size is stocked or custom-made and confirm the production conditions before ordering.
