Designer Shoe Sizes: The Definitive Guide to Luxury Fitment

If you are a US 8 in Nike, logic suggests you should be a 38 or 39 in everything else. In the world of designer shoe sizes, logic often takes a backseat to tradition. The primary source of confusion for international shoppers is the distinction between Standard European (EU) sizing and Italian (IT) sizing.

Most high-end designer footwear—think Prada, Gucci, and Ferragamo—utilizes Italian shoe sizing. Historically, Italian sizing tends to run slightly larger or 'truer' to the foot's length compared to the French sizing (used by brands like Hermes or Chanel) or the standard EU sizing used by German or Scandinavian brands.

The Geography of the Sole

• Italian Sizing (IT): generally the gold standard for luxury. If you are a US 7, you are typically an IT 37. However, the width is often narrower in heritage brands.

• French Sizing (FR): often runs smaller. A US 7 might need to size up to a 38 in French houses.

• Global/Asian Sizing (CN/JP): With the rise of global e-commerce, you might see 'CN' (Chinese) sizing on labels, especially in luxury streetwear collaborations. CN sizing is based on foot length in millimeters. It is precise, but often confuses shoppers used to the abstract IT/EU numbering system.

Before you invest, check our Shoe Size Converter (Intl) to baseline your measurements against these regional variations.

When we talk about ultra-luxury footwear, we have to talk about the 'last'—the physical mold the shoe is constructed around. Every design house has a signature last that dictates the fit. Understanding these nuances is key to calculating your cost-per-wear. If the architecture of the shoe fights the architecture of your foot, you will never wear it.

Here is the stylist’s cheat sheet for the major players:

Christian Louboutin

• The Fit: Notorious for running small and narrow. The toe box is short.

• The Advice: Almost always size up by half a size (0.5). If you have wide feet, you may need to go up a full size, especially in the 'So Kate' or 'Pigalle' styles.

Gucci

• The Fit: generally True to Size (TTS) for heels and sneakers. However, their loafers and mules (like the Princetown) tend to run large.

• The Advice: For backless loafers, size up half a size to prevent your heel from hanging off the edge. For their Ace sneakers, stick to your standard size or size down half a size if you prefer a snug fit.

Balenciaga

• The Fit: This house is all about volume. Their sneakers (Triple S, Track) run famously large.

• The Advice: Size down. A full size down is common for the Triple S. However, their knife-point heels are narrow—stick to your true size there. Check our Sneaker Drop List for specific release notes on these, as seasonal variations occur.

Manolo Blahnik

• The Fit: The holy grail of standard sizing. They are remarkably consistent.

• The Advice: Order your true Italian size. If you are a US 7, the 37 will likely fit like a glove. They are known for accommodating a standard-to-wide foot better than their French counterparts.

Jimmy Choo

• The Fit: largely True to Size, but the width can be generous in their strappy sandals.

• The Advice: Stick to your size. If you have very narrow feet, you might actually find yourself sizing down half a size in open-toed styles to prevent sliding.

You cannot rely on the size you wore five years ago. Feet change shape with age, pregnancy, and weight fluctuation. To measure my foot size at home accurately, you need to ignore your current shoe collection and look at the raw data.

The Paper Tracing Method

1. Prep: Tape a piece of paper to a hard floor (no carpet). Wear the type of socks you intend to wear with the shoes (or bare feet for pumps).

2. Trace: Stand on the paper with your full weight. Have a friend trace the outline of your foot. Keep the pen completely vertical/perpendicular to the floor. Angling the pen in or out will skew the measurement.

3. Measure Length: Measure from the very back of the heel to the tip of your longest toe (which is not always the big toe).

4. Measure Width: Measure the widest part of your foot (usually across the ball of the foot).

The 'Mondo' Factor

Take your length measurement in centimeters. This is your 'Mondopoint,' and it is the most reliable metric for converting to designer shoe sizes. For example, a 24cm foot is generally a US 7 / IT 37 / UK 5.

Stylist Tip: Always measure both feet. Most people have one foot that is slightly larger. Always buy for the larger foot. You can add an insole to the smaller shoe, but you cannot stretch a shoe that is too short without damaging the structural integrity.

Sizing is not just about length and width; it is about pitch. The higher the heel, the more your foot is forced forward into the toe box. This is why a size 37 flat might feel spacious, while a size 37 stiletto feels like a vice.

When buying high heels (100mm+), gravity is working against you. As the foot slides forward, the heel gapes at the back.

• For 85mm-100mm heels: Consider sizing up half a size and using a ball-of-foot cushion to grip the foot. This prevents the toes from being crushed while keeping the heel secure.

• For Platforms: These usually have a more forgiving pitch. Stick to your true size.

If you are unsure about the mechanics of a specific rise, consult our Heel Height Guide to understand how the incline affects sizing requirements.

As a capsule wardrobe architect, I obsess over textiles. The material of the shoe dictates how the size will evolve over time.

• Suede and Nappa Leather: These are soft and porous. They will stretch. If a Nappa leather pump feels comfortably snug in the store, it is perfect. If it feels loose, it will be unwearable in a month.

• Patent Leather: This is leather coated in plastic lacquer. It has almost zero give. It will not stretch. You must buy patent leather shoes that fit perfectly or slightly roomy right out of the box.

• Satin and Fabric: These have no memory. They won't stretch much, but they also won't mold to your foot like leather.

Step out in style by acknowledging that a patent leather size 38 fits differently than a suede size 38, even from the same designer. Adjust your sizing strategy based on the rigidity of the fabric.