Size charts Sep 11, 2026 5 min read

Running Shoe Size Chart by Brand

Running shoes need a half size up for foot swell during long runs. Brands also have offsets vs each other.

The Chart

Brand	Sizing vs Normal	Width Standard	Notes
Nike	Half size small	Narrow-medium	Pegasus, Vaporfly run small. Size up half.
Adidas	True or half large	Medium	Ultraboost runs slightly large.
Brooks	True	Medium-wide	Ghost, Glycerin run true.
Saucony	True	Medium	Endorphin and Triumph true to size.
Hoka	True or half small	Medium	Clifton, Bondi run true. Tighter forefoot.
ASICS	True	Medium-wide	Gel-Kayano, Nimbus true.
New Balance	True	Wide options up to 4E	Best width range of any brand.
On	Half size small	Narrow	Cloud series narrow forefoot.

Feet swell up to half a size during long runs. Tight shoes cause black toenails and blisters. Aim for thumb-width space at toe.

If you have wide feet, brands like New Balance, Brooks, ASICS offer true wide (D for women, 2E/4E for men). Nike and On run narrow.

Tailor Size Guide ships pre-built size charts for Shopify.