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
21 brand-category guides
Lululemon · Leggings
Lululemon Leggings Size Guide
4 leggings tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Adidas · Leggings
Adidas Leggings Size Guide
3 leggings tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Decathlon · Leggings
Decathlon Leggings Size Guide
3 leggings tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Gymshark · Shorts
Gymshark Shorts Size Guide
3 shorts tracked. Community fit data is growing.
Usually runs small. Community fit data is growing. Based on brand sizing information.
Lululemon · Sports Bras
Lululemon Sports Bras Size Guide
3 sports bras tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Nike · Leggings
Nike Leggings Size Guide
3 leggings tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Nike · Sports Bras
Nike Sports Bras Size Guide
3 sports bras tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Castelli · Shorts
Castelli Shorts Size Guide
2 shorts tracked. Community fit data is growing.
Usually runs small. Community fit data is growing. Based on brand sizing information.
Gymshark · Leggings
Gymshark Leggings Size Guide
2 leggings tracked. Community fit data is growing.
Usually runs small. Community fit data is growing. Based on brand sizing information.
Gymshark · Sports Bras
Gymshark Sports Bras Size Guide
2 sports bras tracked. Community fit data is growing.
Usually runs small. Community fit data is growing. Based on brand sizing information.
Lululemon · Shorts
Lululemon Shorts Size Guide
2 shorts tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Nike · Shorts
Nike Shorts Size Guide
2 shorts tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Nike · Tops
Nike Tops Size Guide
2 tops tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Oner Active · Sports Bras
Oner Active Sports Bras Size Guide
2 sports bras tracked. Community fit data is growing.
Varies by range. Community fit data is growing. Based on brand sizing information.
Oner Active · Tops
Oner Active Tops Size Guide
2 tops tracked. Community fit data is growing.
Varies by range. Community fit data is growing. Based on brand sizing information.
Rapha · Shorts
Rapha Shorts Size Guide
2 shorts tracked. Community fit data is growing.
Usually runs small. Community fit data is growing. Based on brand sizing information.
Sweaty Betty · Leggings
Sweaty Betty Leggings Size Guide
2 leggings tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
TALA · Leggings
TALA Leggings Size Guide
2 leggings tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
TALA · Shorts
TALA Shorts Size Guide
2 shorts tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
TALA · Sports Bras
TALA Sports Bras Size Guide
2 sports bras tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.
Under Armour · Leggings
Under Armour Leggings Size Guide
2 leggings tracked. Community fit data is growing.
Usually true to size. Community fit data is growing. Based on brand sizing information.