Community-powered fit intelligence for women
Log your fit.
Know your size in every brand.
Tell us how the activewear you already own fits — 30 seconds, no measuring tape — and get your size across Gymshark, Lululemon, Adidas and more. Then discover what to buy next.
Know the question?
Start where shoppers
actually search.
Body-shape guides
Best activewear for your shape
Leggings, bras, shorts, tops, and jackets grouped by fit signal for apple, pear, hourglass, rectangle, and inverted triangle bodies.
Browse Best Fits →Brand size guides
Does this brand fit true to size?
Check brand and category guides before buying: what runs small, where reviews agree, and which products need more fit data.
Browse Size Guides →Training picks
What to wear for strength training
A beginner guide to squat-proof leggings, supportive bras, and the brands women actually lift in.
See the strength-training guide →Shop by problem
Questions that lead to products
Shop by body type
Use body-shape guidance before brand preference
New to a sport?
What are you training for?
Activity Guide
HYROX
Discover what real women wear for HYROX training and competition.
Activity Guide
Strength Training
Leggings, bras, and tops that hold up under the bar.
Activity Guide
Running
See how activewear fits real women who run.
Activity Guide
Cycling
Find cycling kit that fits your body, not just your bike.
Activity Guide
CrossFit
Kit that holds up through lifting, jumping, and rope climbs.
Activity Guide
Pilates
Body-skimming kit that lets your instructor see your alignment.
Activity Guide
Yoga
Soft, stretchy clothes that move with you through every pose.
Already have a brand in mind?
Most searched
Popular Size Guides
Sweaty Betty
Leggings Size Guide
True to size · Pear and hourglass
Oner Active
Leggings Size Guide
True to size · Hourglass and pear
Tala
Leggings Size Guide
True to size · Curvy and plus-size
Lululemon
Leggings Size Guide
True to size · Petite and hourglass
Gymshark
Leggings Size Guide
Runs small · Size up recommended
How it works
Three steps.
Zero guessing.
Pick your activity
Start with what you are training for. Each guide shows what you need and what to skip.
See what similar women wear
Reviews from women with your build, your measurements, and your training — not brand size guides.
Buy with confidence
Know what to order and in what size before you click. Fewer returns, fewer wrong guesses.
What women are saying
Real fit data.
Real measurements.
Lululemon
Align Legging 25"
“Finally a legging that sits right on my waist. Ordered my usual 12 and it was perfect.”
5'4" · Size 12 · Hourglass
Ordered: 12
Gymshark
Vital Seamless Leggings
“I usually wear a 12 but sized up to a 14. Glad I did — these are very tight across the hips.”
5'6" · Size 12 · Pear
Ordered: 14
Sweaty Betty
Power Bra
“Great support for running. The band doesn't roll and it doesn't dig in.”
5'5" · Size 12 · Rectangle
Ordered: 12
Why Forre exists
Built on what women
actually wear.
Brand size guides are marketing. Forre is built on data from women who bought the thing, trained in it, and told the truth about how it fits.
Start with what you are training for, then match with women who share your height, shape, and measurements.
Explore Activities →No brand bias
Decathlon sits next to Lululemon. Best fit wins.
Real measurements
Reviews include actual body data, not just "I'm a medium."
All bodies
XS to 4X. Every shape. Every height.
Always free
Browse and discover for free. Join to see your matches.
Join for free
Find what to wear for
the training you do.
Start with an activity, see what women built like you actually wear, then buy the right thing first time.