Is Nike true to size?
Nike is true to size. Most shoppers wear their usual size, especially in tops. Nike runs true to size for footwear. Apparel varies, performance and compression pieces run small, lifestyle and fleece pieces are true to size. When in doubt on apparel, size up one. Check the category notes below for tops, bottoms, and outerwear specifically.
Nike generally runs true to size.
Training jackets and windbreakers: size up one, they're cut close for aerodynamics.
Confidence: High, based on official size chart and shopper sentiment
Sizing overview
Most shoppers start with their usual size. Use the notes below to see where Nike feels slimmer, roomier, or more consistent across categories.
Nike is true to size. True to size. Dri-FIT and tech fabrics fit slightly snug.
Plain-language cut notes and examples below show where pieces usually feel closer, roomier, or most predictable.
GENERAL BRAND GUIDANCE
This is a general brand-level sizing summary, not an exact product recommendation. For your specific size, paste a product link into the fit checker.
Nike is true to size. Nike runs true to size for footwear. Apparel varies, performance and compression pieces run small, lifestyle and fleece pieces are true to size. When in doubt on apparel, size up one.
How to read Nike sizing
Sizing tendency
Most shoppers start with their usual size.
Consistency
Medium variation across categories.
Best check
Start with the category note, then check whether the cut is meant to feel structured or relaxed.
Variability and caveats
When Nike can feel different from the usual sizing tendency
Cut
Relaxed cuts usually add ease, so they can feel roomier than the brand’s baseline.
Fabric stretch
Fabric stretch changes how strongly the sizing tendency shows up: more give softens it, less give makes it more obvious.
Styling
Different collections or sub-lines can use different fit blocks, so styling changes may matter as much as the label size.
Nike Sizing by Category
True to size. Dri-FIT and tech fabrics fit slightly snug.
What to expect
Expect tops to follow the label fairly closely unless the piece is intentionally oversized or sharply tailored.
True to size. Joggers and sweats are relaxed; performance tights run snug.
What to expect
Expect bottoms to follow the label fairly closely unless the piece is intentionally oversized or sharply tailored.
Runs small compared to dress shoes. Most users size up by 0.5.
What to expect
Expect shoes to feel closer than the label suggests, especially in more structured pieces.
Compression gear is very tight; size up for a standard fit. Performance-first compression reduces mechanical stretch, size up for lifestyle comfort.
What to expect
Expect activewear to feel closer than the label suggests, especially in more structured pieces.
How does Nike sizing compare to other brands?
Nike is true to size. Compared to similar brands shoppers frequently compare against:
Both fit true to size, your size should be similar at both brands.
Both fit true to size, your size should be similar at both brands.
Both fit true to size, your size should be similar at both brands.
Both fit true to size, your size should be similar at both brands.
Nike is true to size, while Under Armour runs small. Your size may differ between these brands.
Compare Brands
Common questions about Nike sizing
Is Nike true to size?
Nike is true to size. Nike runs true to size for footwear. Apparel varies, performance and compression pieces run small, lifestyle and fleece pieces are true to size. When in doubt on apparel, size up one. Most shoppers start with their usual size.
What size am I in Nike if I wear a Medium?
A Medium at Nike is roughly the same as a Medium at most contemporary brands. Fit can vary across tops, bottoms, shoes, and activewear, so confirm against the specific category you are shopping.
Does Nike fit differently by category?
Yes. Fit varies by category at Nike, covering tops, bottoms, shoes, and activewear, since the same brand often cuts tops and activewear to different proportions.
Is Nike's size chart accurate?
Nike publishes an official size chart, and ThisFits cross-references it against real shopper fit reports. Nike shows medium variation across categories, so the chart is a reliable starting point with adjustments based on cut.
What if I'm between sizes at Nike?
Nike fits true to size, so when you are between sizes, pick based on how close you want the cut to feel. Sizing up gives a relaxed feel and sizing down gives a more fitted silhouette.
How does Nike sizing compare to other brands?
Nike sizes similarly to H&M and Uniqlo, your usual size applies. Shoppers commonly compare Nike against other contemporary labels in the same category to translate sizes between brands they already wear.
Can I return Nike items if the size is wrong?
Nike typically accepts returns on unworn items with tags within the window stated on the order page or receipt. Policies vary by retailer and third-party sellers may differ, so confirm before ordering.