The sizing truth: Nike is easy, Adidas and Zara run small, and Uniqlo will humble you.
If you’ve ever rage-ordered three sizes and returned two, this guide is your permission slip to stop blaming your body and start blaming inconsistent brand grading.
Keep it simple: Nike is the least stressful (mostly true to size), Adidas runs small, and Zara + H&M will have you sizing up like you’re shopping in a different country – because you are. My cheat code lately: pick a "baseline brand" you know (for a lot of people it's Nike or Levi's), then adjust from there depending on the label. Your cart will be calmer. Your returns pile will be smaller. Bubu approved, because fewer boxes for him to steal.
Brand-by-Brand Sizing Breakdown
Nike – The Predictable One
Nike Shoes (Men's): True to Size. Some models like Air Max may run slightly small. If you have narrow feet, consider sizing up 0.5.
Recommendation: Order your normal US size.
Popular models: Air Max, Air Force 1, Air Jordan.
Nike Shoes (Women's): True to Size. Running shoes may run slightly small – consider sizing up 0.5.
Recommendation: Order your normal US size.
Popular models: Air Max, Air Force 1, React.
Nike Clothing (Men's): True to Size. Athletic fit is slightly more fitted than regular fit.
Nike Clothing (Women's): True to Size. Dri-FIT materials may feel tighter initially.
My take: Nike is that friend who's not perfect but is at least predictable.
Adidas – Size Up, Especially for Shoes
Adidas Shoes (Men's): Runs Small. "Most customers need to size up 0.5 to 1 full size."
Recommendation: Size up 0.5 to 1 full size.
Popular models: Stan Smith, Ultraboost, Superstar.
Adidas Shoes (Women's): Runs Small. Same deal – size up 0.5 to 1.
Recommendation: Size up 0.5 to 1 full size.
Adidas Clothing (Men's): Runs slightly small. Consider sizing up for looser fit.
Adidas Clothing (Women's): Runs Small. Size up for comfortable fit.
My take: If you're between sizes and you hate a squeezed toe box, Adidas is where I'd stop being brave and just size up.
Zara – European Sizing, Expect to Size Up
Zara Clothing (Men's): Runs Small and fitted. European sizing tends to be smaller than US.
Recommendation: Size up 1-2 sizes from US.
Zara Clothing (Women's): Runs Very Small. European sizing is significantly smaller than US sizing.
Recommendation: Size up 1-2 sizes from US.
Zara Shoes (Men's): Runs Small.
Recommendation: Size up 0.5 to 1 full size.
Zara Shoes (Women's): Runs Small and narrow.
Recommendation: Size up 0.5 to 1 full size.
Truth: Zara pieces can look amazing on the hanger and then feel like you're being shrink-wrapped. Plan for that.
H&M – Classic "Know Your Strategy" Brand
H&M Clothing (Men's): Runs Small. European sizing differs from US sizing.
Recommendation: Size up 1 size from US.
H&M Clothing (Women's): Runs Small.
Recommendation: Size up 1-2 sizes from US sizing.
My take: H&M is the classic "it's fine if you already know your strategy" brand. Without a strategy, it's chaos.
Uniqlo – The Bicultural Sizing Reality Check
Uniqlo Clothing (Men's): Runs Small because it's based on Asian sizing.
Recommendation: Size up 1-2 sizes from US.
Uniqlo Clothing (Women's): Runs Very Small. Asian sizing is significantly smaller than US.
Recommendation: Size up 2 sizes from US.
This is the bicultural sizing moment I wish more people said out loud: a "medium" is not a universal truth. A lot of US shoppers walk into Uniqlo expecting US grading, and then think something's wrong with them. Nope – different sizing base.
Levi's – Dependable Denim
Levi's Jeans (Men's): True to Size. Different fits like 511, 512, 514 have different sizing behavior, but overall true to US waist size.
Recommendation: Order your normal US waist size.
Levi's Jeans (Women's): True to Size (varies by style). Classic fits run true to size.
Recommendation: Order your normal US size.
My take: Levi's being basically dependable? Love that for us.
SHEIN – Check Charts, Always
SHEIN Clothing (Women's): Runs Very Small because it uses Asian sizing.
Recommendation: Always check size charts and size up 1-2 sizes.
Keep it / Return it energy: heavily dependent on you actually checking the chart before you fall in love with the photos.
Quick Reference Sizing Chart
Brand | Category | Sizing | Recommended Action |
|---|---|---|---|
Nike | Men's Shoes | True to Size | Order normal US size |
Nike | Women's Shoes | True to Size | Order normal US size (running: size up 0.5) |
Nike | Clothing | True to Size | Order normal US size |
Adidas | Shoes | Runs Small | Size up 0.5-1 |
Adidas | Clothing | Runs Small | Size up for comfort |
Zara | Clothing | Runs Very Small | Size up 1-2 |
Zara | Shoes | Runs Small + Narrow | Size up 0.5-1 |
H&M | Clothing | Runs Small | Men: +1 / Women: +1-2 |
Uniqlo | Clothing | Runs Small (Asian sizing) | Men: +1-2 / Women: +2 |
Levi's | Jeans | True to Size | Order normal US size |
SHEIN | Clothing | Runs Very Small | Size up 1-2, check charts |
How to Style It (Without Trying On 12 Sizes)
Sizing guides don't sound "fashion," but they're the reason your outfit looks intentional instead of slightly off.
Outfit Formula #1: Sporty Basics That Actually Fit
Start with Nike clothing (true to size) for an easy baseline
Pair with Nike shoes (true to size) for a clean, predictable foundation
Why it works: when the base layers fit correctly, everything else looks more expensive
Outfit Formula #2: The "European Brand" Look Without the Squeezing
Buying Zara clothing (runs small/very small)? Size up 1-2 sizes from US so it reads sleek, not tight
For Zara women's shoes (runs small and narrow), size up 0.5 to 1 so you can actually walk
Outfit Formula #3: Clean Minimal Staples, But Make Sizing Make Sense
With Uniqlo (men's runs small; women's runs very small), treat it like a different sizing system
Men: size up 1-2 from US / Women: size up 2 from US
This is how you get that polished, unfussy silhouette instead of an accidentally cropped, pulling-at-the-buttons situation
Sizing & Fit Notes – The "True to Size If…" Quick Reference
Nike shoes (men's): True to size, but Air Max may run slightly small; size up 0.5 for narrow feet
Nike shoes (women's): True to size, but running shoes may run slightly small; consider sizing up 0.5
Nike clothing: True to size. Athletic fit is more fitted; Dri-FIT may feel tighter initially
Adidas shoes: Runs small; size up 0.5 to 1
Adidas clothing: Men's runs slightly small; women's runs small – size up
Zara clothing: Men's runs small/fitted; women's runs very small – size up 1-2
Zara shoes: Runs small; women's also narrow – size up 0.5 to 1
H&M clothing: Runs small – men size up 1, women size up 1-2
Uniqlo clothing: Runs small due to Asian sizing – men size up 1-2, women size up 2
Levi's jeans: Generally true to size; classics run true
SHEIN: Runs very small – check charts and size up 1-2
FAQ – Brand Sizing Questions Answered
Which brand has the most consistent sizing?
Nike and Levi's are the most consistent. Both use US-based grading and generally run true to size across most products. If you want a safe online shopping experience, start with these two.
Why do Zara and H&M run so small?
Zara and H&M use European sizing conventions, which are smaller than US sizing by about 1-2 sizes. A US size 6 is roughly a European size 36-38, but the fit is also cut more narrowly. Always size up when ordering from these brands.
Is Uniqlo sizing different in the US?
Yes. Uniqlo is a Japanese brand and uses Asian sizing as its base. Even their US stores use the same grading system. A Uniqlo "medium" is closer to a US "small" or "extra small" in many other brands. Women should size up 2 sizes from their typical US size.
Do Nike shoes run true to size?
Generally yes. Nike men's and women's shoes are true to size for most models. However, running shoes like the React series may feel slightly snug – consider sizing up 0.5 if you plan to wear thick socks or have wider feet.
What's the most reliable way to size Adidas shoes?
Size up 0.5 to 1 full size from your normal US size. This is especially true for popular models like Stan Smith, Ultraboost, and Superstar. The toe box runs narrow, so if you're between sizes, go with the larger one.
Why does SHEIN sizing feel so inconsistent?
SHEIN uses Asian sizing and also carries multiple manufacturer lines with inconsistent grading. Always check the individual product size chart (not the general size guide) and read reviews that mention the shopper's height/weight for the most accurate guidance.
How do I know if a brand runs true to size?
My shortcut: use a baseline brand you already know (Nike or Levi's are great). Order one item from the new brand in your normal size, test the fit, and adjust from there. Once you learn a brand's sizing pattern, future orders get much easier.
What should I do if I'm between sizes?
For athletic brands (Nike, Adidas): size up for a more comfortable fit
For European brands (Zara, H&M): size up to the next full size
For Asian sizing brands (Uniqlo, SHEIN): size up one full size and check the chart
For denim (Levi's): go with your waist measurement – you can always belt it
Does fabric affect sizing?
Yes, significantly. Stretchy fabrics (jersey, elastane blends) are more forgiving and may allow you to stay true to size. Stiffer fabrics (denim, woven cotton, leather) have less give – always size up if you're uncertain. Dri-FIT and compression materials at Nike may also feel tighter initially but loosen with wear.
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