Why Sizing Matters
Korean Sizing Is Different
If you have ever ordered a Korean top in your usual US size and found it impossibly tight, you are not alone. Korean fashion sizing runs 1 to 2 sizes smaller than American sizing across nearly every category. A US Medium is often a Korean Large or even XL. Understanding this gap is the single most important thing you can do before adding Korean pieces to your wardrobe.
Korean brands also use a unique numbering system. Instead of S/M/L, you will often see numbers like 44, 55, 66, and 77, which correspond to body measurements in centimeters. "Free size" (one-size-fits-all) is common too, but it typically fits only US XS to S. This guide breaks it all down so you can shop Korean brands on Amazon with confidence.
Tops & Blouses
Tops Size Conversion
Korean tops run 1-2 sizes smaller than US. If you are a US Medium, start with Korean L or XL. Oversized K-fashion styles may only need one size up.
| US Size | Korean Size | Korean Number | Bust (in) | Bust (cm) |
|---|---|---|---|---|
| XS (0-2) | S (85) | 44 | 31-32 | 80-82 |
| S (4-6) | M (90) | 55 | 33-34 | 84-88 |
| M (8-10) | L (95) | 66 | 35-36 | 90-94 |
| L (12-14) | XL (100) | 77 | 37-39 | 96-100 |
| XL (16-18) | XXL (105) | 88 | 40-42 | 102-108 |
Pants & Skirts
Bottoms Size Conversion
Korean bottoms often use waist measurements in inches. K-fashion jeans tend to run slim, especially from brands like Chuu and Stylenanda, so size up for comfort.
| US Size | Korean Size | Waist (in) | Waist (cm) | Hip (in) |
|---|---|---|---|---|
| 0-2 (XS) | 25-26 | 24-25 | 61-64 | 33-34 |
| 4-6 (S) | 27-28 | 26-27 | 66-70 | 35-36 |
| 8-10 (M) | 29-30 | 28-30 | 72-76 | 37-39 |
| 12-14 (L) | 31-32 | 31-32 | 78-82 | 40-42 |
| 16-18 (XL) | 33-34 | 33-35 | 84-90 | 43-45 |
Footwear
Shoes Size Conversion
Korean shoes use millimeters (mm). A US Women's 7 is 240mm in Korean sizing. Korean shoes tend to run narrow, so go up 5mm if you have wider feet.
| US Women's | Korean (mm) | EU | Foot Length (cm) |
|---|---|---|---|
| 5 | 220 | 35 | 22.0 |
| 5.5 | 225 | 35.5 | 22.5 |
| 6 | 230 | 36 | 23.0 |
| 6.5 | 235 | 37 | 23.5 |
| 7 | 240 | 37.5 | 24.0 |
| 7.5 | 245 | 38 | 24.5 |
| 8 | 250 | 39 | 25.0 |
| 8.5 | 255 | 39.5 | 25.5 |
| 9 | 260 | 40 | 26.0 |
| 10 | 270 | 41 | 27.0 |
Watch Out
Common Sizing Pitfalls
Free Size Means Small
"Free size" in Korean fashion usually fits US XS to S (Korean 44-55). If you are above a US size 4, skip free-size items and look for numbered sizes instead.
Flat Measurements Are Half
Korean sellers often provide "flat measurements" (garment laid flat). You need to double the width measurement to get your actual body size. This is the most reliable way to check fit.
Fabric Changes Everything
If the item contains spandex or elastane, you can often stay true to your Korean size. For non-stretch fabrics (100% cotton, linen), size up one additional size for comfort.
Returns Are Harder from Korea
Ordering from Amazon or US-based retailers like YesStyle and W Concept gives you easier return policies. The slight markup is worth the sizing peace of mind.
Brand-Specific Tips
How Popular Brands Fit
Not all Korean brands size the same. Here is how popular K-fashion brands compare so you know how much to adjust.
| Brand | Fit | Sizing Advice |
|---|---|---|
| Musinsa Standard | True to Korean size | Check each seller's individual size chart. Sizes vary by brand on the platform. |
| W Concept | Slightly small | Designer brands run slimmer. Size up 1 from your Korean size. |
| 8seconds | Relaxed fit | Samsung's fashion brand. More generous cuts than typical K-fashion. True to Korean size. |
| Stylenanda / 3CE | Runs small | Trendy and slim. Size up 1-2 from US. "Free size" fits XS-S only. |
| Chuu | Very small | Known for "-5kg jeans." Runs very small and slim. Size up 2+ from US. |
| SPAO | Slightly generous | Casual basics with roomier fits. True to Korean size works for most. |
Get It Right
How to Measure Yourself
Accurate measurements are the key to getting K-fashion right on the first try. Use a soft measuring tape, wear thin clothing, and stand naturally.
Bust
Wrap the tape around the fullest part of your chest. Keep it level and snug but not tight. Breathe normally.
Waist
Measure at the narrowest point of your natural waist, usually just above the belly button. Do not suck in.
Hip
Measure around the fullest part of your hips with feet together. Keep the tape parallel to the floor.
Smart Shopping
Shopping Korean Brands on Amazon
Amazon is one of the easiest ways to buy Korean fashion in the US. You get Prime shipping, straightforward returns, and buyer protection. Here are our top tips for finding well-fitting Korean pieces on Amazon.
Always read the seller's size chart in the product listing rather than relying on Amazon's generic sizing. Look for listings that show flat-lay measurements in centimeters. Check reviews from buyers who mention their height, weight, and the size they ordered. Filter for items with "free returns" so you can exchange sizes without cost.