UK size guides
Activewear size guides by brand
Check whether a brand runs small, true to size, or varies by product type before you buy. Guides are generated only where Forre has enough products or fit review signal to be useful.
Available guides
24 brand-category guides
Lululemon · Leggings
Lululemon Leggings Size Guide
4 leggings tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Adidas · Leggings
Adidas Leggings Size Guide
3 leggings tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Decathlon · Leggings
Decathlon Leggings Size Guide
3 leggings tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Fabletics · Leggings
Fabletics Leggings Size Guide
3 leggings tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Gymshark · Shorts
Gymshark Shorts Size Guide
3 shorts tracked for product-level fit guidance.
Fit read: No fit data yet. Usually runs small.
Lululemon · Sports Bras
Lululemon Sports Bras Size Guide
3 sports bras tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Nike · Leggings
Nike Leggings Size Guide
3 leggings tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Nike · Sports Bras
Nike Sports Bras Size Guide
3 sports bras tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Adanola · Sports Bras
Adanola Sports Bras Size Guide
2 sports bras tracked for product-level fit guidance.
Fit read: No fit data yet. Usually runs small.
Castelli · Shorts
Castelli Shorts Size Guide
2 shorts tracked for product-level fit guidance.
Fit read: No fit data yet. Usually runs small.
Gymshark · Leggings
Gymshark Leggings Size Guide
2 leggings tracked for product-level fit guidance.
Fit read: No fit data yet. Usually runs small.
Gymshark · Sports Bras
Gymshark Sports Bras Size Guide
2 sports bras tracked for product-level fit guidance.
Fit read: No fit data yet. Usually runs small.
Gymshark · Tops
Gymshark Tops Size Guide
2 tops tracked for product-level fit guidance.
Fit read: No fit data yet. Usually runs small.
Lululemon · Shorts
Lululemon Shorts Size Guide
2 shorts tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Nike · Shorts
Nike Shorts Size Guide
2 shorts tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Nike · Tops
Nike Tops Size Guide
2 tops tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Oner Active · Sports Bras
Oner Active Sports Bras Size Guide
2 sports bras tracked for product-level fit guidance.
Fit read: No fit data yet. Varies by range.
Oner Active · Tops
Oner Active Tops Size Guide
2 tops tracked for product-level fit guidance.
Fit read: No fit data yet. Varies by range.
Rapha · Shorts
Rapha Shorts Size Guide
2 shorts tracked for product-level fit guidance.
Fit read: No fit data yet. Usually runs small.
Sweaty Betty · Leggings
Sweaty Betty Leggings Size Guide
2 leggings tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
TALA · Leggings
TALA Leggings Size Guide
2 leggings tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
TALA · Shorts
TALA Shorts Size Guide
2 shorts tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
TALA · Sports Bras
TALA Sports Bras Size Guide
2 sports bras tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.
Under Armour · Leggings
Under Armour Leggings Size Guide
2 leggings tracked for product-level fit guidance.
Fit read: No fit data yet. Usually true to size.