I’ve often found myself staring at shoe size numbers, each one a potential puzzle. That simple “38” printed inside a heel tells different stories depending on where it came from. Asian manufacturers might mean it as a US size 7, while European makers could intend it as a size 5.
These numbers, stripped of context, leave us guessing. No country mark, no conversion chart – just digits asking to be decoded. Through numerous online shopping experiences and returns, I’ve learned a number alone doesn’t tell the whole story, especially when crossing continents and manufacturing traditions.
Key Takeaway
- Asian size 38 typically converts to a US women’s size 7.5 and a US men’s size 6.
- Always measure your foot length in centimeters for the most accurate fit.
- Consult brand-specific size charts, as sizing can vary significantly between different manufacturers.
Decoding Asian Size 38
The Metric Reality Behind the Number
Size 38 isn’t arbitrary. It correlates to a foot length of approximately 24.5 centimeters. That’s the key. Not the number, but the centimeters. And depending on who’s interpreting that number, it can lead to different outcomes.
In many Asian countries—like China, Japan, and Korea—the sizing is more aligned with foot length than with a scaled system. A size 38 in Asia generally corresponds to:
- US Women’s Size 7.5
- US Men’s Size 6
But I wouldn’t blindly trust that. I’ve worn a 38 that felt like a 7, and another that hugged like an 8. Even the same size can wear differently depending on materials, cut, or brand standards (which they rarely explain well).
Why Sizing Isn’t Just About Length
Length is easy. You measure from heel to toe. But shoes don’t just go front to back. They go side to side. They cradle arches and hug insteps.
Width matters—sometimes even more than length. A narrow 38 can feel like it’s slicing my toes. A wide 38? Feels like I’m swimming in leather.
The Art of Accurate Foot Measurement
How to Measure Your Feet Size[ Beginners Explainer Video 2020]
Credits: Shoemaking Courses Online
It’s important to measure your feet periodically, as foot size can change over time due to various factors. Our feet aren’t static – they respond to life changes, daily habits, and even gravity. After logging thousands of steps on concrete floors, I’ve watched my measurements shift by nearly half a centimeter.
The Basic Setup
My measurement ritual requires:
- Blank paper (larger than your foot)
- Strong tape
- A pencil
- Measuring tape or ruler
- Good lighting
- Flat, hard floor
The Process Matters
Morning measurements differ from evening ones. I’ve found that feet swell up to 5% throughout the day, so I measure when my feet are at their largest – usually evening time. My steps:
- Secure the paper firmly against a wall
- Stand straight, weight evenly distributed
- Keep the pencil perfectly vertical while tracing
- Mark both the length and width at the widest points
- Repeat for the other foot
Beyond Basic Numbers
Raw measurements tell only part of the story. I track:
- Length from heel to longest toe
- Width at the ball of foot
- Arch height (using the wet test method)
- Any pressure points or problem areas
My 24.5cm measurement translates differently across brands and regions. Asian size 38 might work on paper, but factors like toe box shape and arch support matter just as much as pure numbers.
Feet are three-dimensional objects we’re trying to fit into two-dimensional measurements. Numbers help, but they’re just the starting point for finding shoes that truly fit.
Breaking Down the Widths
I’ve learned that shoe width matters as much as length, often the hard way. After years of focusing only on length measurements, I discovered that width could make or break comfort – especially during long days.
Standard Width Classifications
The basic width system includes:
- AAA/2A (Extra Narrow)
- AA/A (Narrow)
- B (Standard Women’s)
- D (Standard Men’s)
- E/EE (Wide)
- EEE/4E (Extra Wide)
Reading Your Feet’s Signals
My feet send clear messages when width isn’t right:
Too Narrow Signs:
- Numbness in toes
- Side-wall pressure
- Bunion development
- Restricted toe movement
- Painful pressure points
Too Wide Indicators:
- Heel slippage
- Lack of midfoot support
- Excessive movement
- Arch fatigue
- Blisters from friction
Material Considerations
Different materials respond uniquely to width issues:
- Leather stretches up to 1/4 inch
- Canvas gives immediately
- Synthetic materials hold firm
- Mesh adapts but loses support
I’ve found that width needs change throughout the day. Morning measurements might suggest a standard width, but by evening, my feet often need more room. This variation of up to 1/2 width size means I sometimes buy two different widths for morning and evening wear.
The right width creates a shoe that feels like it’s holding, not squeezing. When I find that sweet spot, walking becomes effortless – no adjustments, no pain points, just comfort with every step.
Every Brand Has Its Own Idea of 38
Trendsi’s seamless online shopping experience provides detailed size charts for each brand, helping you navigate those differences with ease and find shoes that fit just right.
That’s where brand-specific charts come in. Some make their 38 run narrow, assuming a slimmer Asian foot. Others model it after European sizing—closer to the standard EU 38, which can feel longer.
My Sizing Routine Before Buying
- I re-measure my feet. Always.
- I check the brand’s chart. Not just length—look for foot width and internal sole length.
- I skim reviews. Keywords like “true to size” or “runs small” are gold.
Pay Attention to Shoe Type
Even with the same brand and size, different shoes fit differently.
- Sneakers are more forgiving.
- Sandals expose the foot more—so width matters more.
- Boots can constrict ankles and toes, especially when lined.
The Shopping Equation for Asian Size 38
I’ve made it into a checklist. Because trial and error gets expensive.
Before You Buy:
- Measure your feet again
- Compare to size chart (length + width)
- Check user photos if available
- See if returns are easy (they usually aren’t with international orders)
If the Shoe Arrives and Doesn’t Fit:
- Try thicker/thinner socks
- Use insoles or heel grips
- Resell it (someone else is your foot twin)
Why Size Conversion Isn’t Straightforward
There’s no perfect map between Asian and US sizes. That’s because the systems were built separately. The Asian systems, especially Japanese and Korean ones, use foot length directly as the size. Makes sense, right?
A 245 in Korea is 24.5 cm—simple. But converting that to US sizes? It’s guesswork.
| Asian/EU Size | US Women’s | US Men’s | Foot Length (cm) |
| 38 | 7.5 | 6 | 24.5 |
It looks neat. But it isn’t. Not in practice.
Real-Life Example: My Sandal Snafu
I ordered a pair of sandals marked size 38. They looked perfect online. When they arrived, the arch was off. My heel hung off the back edge.
Turns out, the brand measured internal sole length, not foot length. So while the sole was 24.5 cm, the usable footbed was 23.5.
Since then, I always ask (if possible): is this based on foot length or shoe length?
Sizing Problems That Can Ruin a Shoe
The Pain Points of Poor Fit
These aren’t minor annoyances. They change how you walk, how long you can stand, and whether you ever wear the shoes again.
- Blisters from seams rubbing wrong
- Calluses from repeated friction
- Arch pain from lack of support
- Bunions from cramped toe boxes
What I Do to Avoid Them
- Choose shoes that match my measured length
- Never assume a 38 always fits
- Stretch tight areas if material allows
- Break in slowly: an hour a day indoors
Technical Tip: Foot Volume Matters Too
If your foot volume varies, Trendsi’s flexible shoe options, including customizable designs and private labeling, can help you find shoes that adapt to your unique foot shape.
I have a medium arch, but low volume feet. That means even a perfect-length shoe can feel loose. So sometimes I add a thin insole—not for cushioning, but to lift my foot and fill space.
Size Confusion in a Global Market
I think this is the real reason sizing is so chaotic—globalization.
Manufacturers aim to serve multiple regions. But instead of adapting fully, they slap on equivalent sizes using outdated charts. No accounting for foot shape differences, climate (feet swell in heat), or even sock thickness.
Examples of Regional Sizing Logic
- Japan: Uses foot length (cm) as size directly
- Korea: Similar to Japan, with 5mm increments
- China: Often mimics EU sizing but with local adjustments
Simple Fixes That Help a Lot
Sometimes you can’t return the shoe. That’s when creativity saves the day.
Tricks I Use:
- Heel grips: Stop back slipping
- Arch supports: Change the internal contour
- Thick socks or double socks: Fill out space
- Leather stretch spray: Works wonders for pinched toes
What Never Works:
- Hoping it’ll stretch “just enough” on its own
- Ignoring pain on day one
- Walking outside before confirming the fit
Why I Still Buy Shoes Labeled 38
Because once in a while, it’s magic. The shape is right, the length perfect, the material forgiving. And that’s worth the risk.
The number 38 might not say much on its own, but when paired with accurate measurement and smart shopping, it becomes more than just a guess—it becomes a good bet.
Bonus: Conversion Table Across Regions
Here’s a quick table for reference when buying from different countries:
| Country/Region | Label Size | US Women’s | US Men’s | Foot Length (cm) |
| Japan | 24.5 | 7.5 | 6 | 24.5 |
| Korea | 245 | 7.5 | 6 | 24.5 |
| EU | 38 | 7.5 | 6 | 24.5 |
| China | 38 | 7.5 | 6 | 24.5 |
And remember: always measure before you buy. Numbers can lie. Your feet won’t.
FAQ
What size is Asian 38 in US women’s shoes?
Asian size 38 typically equals a US women’s size 7 to 7.5. There can be slight variations depending on the country of origin (China, Japan, Korea) and the specific manufacturer, so it’s always good to check size charts when shopping.
How do I convert Asian size 38 to US men’s size?
Asian size 38 converts to approximately US men’s size 5 to 5.5. Men’s shoes run about 1.5 sizes smaller than women’s, so what fits a woman as a 7-7.5 would fit a man as a 5-5.5.
Why are Asian shoe sizes different from US sizes?
Asian sizing systems use centimeters to measure foot length, while US sizing uses barleycorns (? inch). This different measurement standard developed historically as countries created their own sizing systems based on local practices and needs.
Are Asian size 38 shoes smaller than US size 7?
Not necessarily. Asian size 38 is roughly equivalent to US women’s 7-7.5, but the fit can differ. Asian shoes often have a narrower design and might feel slightly smaller than their US counterparts with the same numerical size.
Do Asian size 38 shoes have different width than US shoes?
Yes, typically Asian size 38 shoes are designed for narrower feet compared to US shoes. While US shoes often come in different width options (narrow, medium, wide), Asian shoes generally assume a narrower foot structure.
How do I measure my foot to check if Asian 38 fits me?
Measure your foot length from heel to longest toe in centimeters. Asian size 38 typically fits feet around 24-24.5 cm long. For width, measure the widest part of your foot. Compare these measurements to specific size charts for best results.
Will ordering Asian size 38 online be risky for US customers?
Ordering Asian size 38 can be tricky if you typically wear US sizes. Size variations between manufacturers, different width standards, and return shipping complications make it somewhat risky. Always check customer reviews about sizing before purchasing.
How can I be sure Asian size 38 shoes will fit me?
Try checking the exact foot length in centimeters (usually 24-24.5cm for size 38). Look for customer reviews mentioning fit and sizing. When possible, buy from retailers with good return policies in case the shoes don’t fit as expected.
Conclusion
I’ve learned that shoe sizing leaves little room for error. While other clothing forgives size variations, shoes demand precision. Each measurement, width check, and size conversion builds confidence in my choices.
With the right measurements, the right width, and the right retailer like Trendsi, that size 38 becomes your perfect fit every time—shop their wide selection today to find your ideal shoes.