Accurate Size Recommendations that Shoppers Love
AI Size & Fit Recommendation for eCommerce
Your shoppers don’t know what size to buy, which leads to abandoned sessions, high return rates, and bracketing. Adding WAIR gives your customers size selection confidence, which increases your profitability.
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PROVEN IMPACT
Size & Fit Recommendation that Works!
4.3%
Return Rate avg. decrease vs. control
19.1%
Conversion Rate avg. increase vs. Control
25X
ROI directly attributed to WAIR
We’ll prove it with our A/B experiment. We run the test for you to save your team time and energy.
TRUSTED BY SHOPIFY BRANDS
Boosted performance & experience
WAIR is trusted by hundreds of brands and over 50 million shoppers every day.
Adrianna Papell, founded in NYC in 1980, began as a vision to help all women feel their most beautiful. The company fast evolved from daytime dresses to include elegant evening and cocktail wear. We're thrilled that customers have continued to respond to our classic design philosophy, allowing us to expand our brands and product lines. Explore our history and learn more about what makes Adrianna Papell special.
Adrianna Papell, founded in NYC in 1980, began as a vision to help all women feel their most beautiful. The company fast evolved from daytime dresses to include elegant evening and cocktail wear. We're thrilled that customers have continued to respond to our classic design philosophy, allowing us to expand our brands and product lines. Explore our history and learn more about what makes Adrianna Papell special.
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xSuit, the innovative menswear brand, partnered with WAIR to give shoppers precise fit guidance online. WAIR’s AI recommendations reduce sizing guesswork, boost confidence, and drive higher conversion—helping xSuit deliver tailored comfort and performance straight out of the box.
xSuit, the innovative menswear brand, partnered with WAIR to give shoppers precise fit guidance online. WAIR’s AI recommendations reduce sizing guesswork, boost confidence, and drive higher conversion—helping xSuit deliver tailored comfort and performance straight out of the box.
As a multi-brand retailer, SwimOutlet needed a sizing solution that could handle complex fit challenges across dozens of brands. They chose WAIR for its shopper-friendly experience and unmatched fit accuracy—driving higher conversion, AOV, and overall profitability.
As a multi-brand retailer, SwimOutlet needed a sizing solution that could handle complex fit challenges across dozens of brands. They chose WAIR for its shopper-friendly experience and unmatched fit accuracy—driving higher conversion, AOV, and overall profitability.
Bad Birdie, the bold golf apparel brand, chose WAIR to give shoppers confidence in fit while shopping online. With WAIR’s accurate size recommendations, they reduced uncertainty, lifted conversions, and delivered a shopping experience as smooth as their style.
Bad Birdie, the bold golf apparel brand, chose WAIR to give shoppers confidence in fit while shopping online. With WAIR’s accurate size recommendations, they reduced uncertainty, lifted conversions, and delivered a shopping experience as smooth as their style.
“After pausing WAIR for a few months due to budget constraints, it became clear how important it was to our customer experience. We brought it back this time across both our website and mobile app because it removes friction from sizing decisions and helps reduce returns. WAIR just makes the path to purchase smoother.”
Ryan Groh
Director of eCommerce, BYLT Basics
And Hundreds More
HOW IT WORKS
Sizing Communication that Works!
1. WAIR solves the size and fit problem for shoppers
2. Proven revenue lift from real A/B Tests
3. Powered by real body data, not guesses
4. Recommends based on real shopper fit reviews
5. Fast and accurate shopper experience
6. Actionable insights for design and merchandising
7. Easy setup and immediate ROI pricing model
8. Fit AI that improves with every use
Customers won't buy if they are unsure of the best size.
Size confusion is responsible for 35% of abandoned carts and over 50% of returns. WAIR’s unique ability to predict shopper body dimensions and recommend the best fitting sizes of each product help more shoppers confidently convert, which increases your profit margins per shopping session.
WAIR works on all garment types and fit intentions
Our recommendation engine is developed for each product (individually).
Jeans
Shirt / Dress Shirt
T-Shirt
Pants / Trousers
Skirt
Jacket / Blazer
Sweater / Hoodie
Activewear / Leggings
Jeans
Shirt / Dress Shirt
T-Shirt
Pants / Trousers
Skirt
Jacket / Blazer
Sweater / Hoodie
Activewear / Leggings
Brands choose WAIR
Discover why hundreds of brands chose WAIR over all other fit tech providers to enhance their shopping experience.
xSuit
Bad Birdie, the bold golf apparel brand, chose WAIR for confident online shopping. WAIR’s size recommendations reduced uncertainty and improved conversions.
View Case study
Swim Outlet
As a multi-brand retailer, SwimOutlet needed a sizing solution that could handle complex fit challenges across dozens of brands. They chose WAIR for its shopper-friendly experience and unmatched fit accuracy—driving higher conversion, AOV, and overall profitability.
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xSuit
Bad Birdie, the bold golf apparel brand, chose WAIR for confident online shopping. WAIR’s size recommendations reduced uncertainty and improved conversions.
View Case study
Bad Birdie
Bad Birdie, the bold golf apparel brand, chose WAIR to give shoppers confidence in fit while shopping online. With WAIR’s accurate size recommendations, they reduced uncertainty, lifted conversions, and delivered a shopping experience as smooth as their style.
xSuit
Bad Birdie, the bold golf apparel brand, chose WAIR for confident online shopping. WAIR’s size recommendations reduced uncertainty and improved conversions.
View Case study
SHE FIT
SHEFIT, the performance sports bra brand, partnered with WAIR to ensure women find their perfect fit on the first try. By eliminating sizing uncertainty, WAIR helps SHEFIT boost conversions, reduce returns, and deliver the confident experience their shoppers expect.
Confident Sizing, Proven Results
Simple Integration, Immediate ROI, Constant Value.
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WAIR works on many
eCommerce platforms
Don’t see your platform, let us know. We’re always building.
SCHEDULE A DEMO
See It in Action
Book your free demo and explore how WAIR’s sizing intelligence transforms online shopping into confident buying.
500M
Size recommendations delivered
$1.02B
Revenue generated by WAIR
50M
Shoppers using WAIR
25X
Return on Investment
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TESTIMONIALS
Shoppers love using WAIR
Discover why millions of shoppers trust WAIR to deliver personalized sizing and a seamless shopping experience.
The pants were a lot more stretchy than I had expected. Glad I listened to WAIR’s recommendation to size down for the best fit!
Alex Thompson
The widget recommended I choose Modern Fit over their Slim fit and happy I did. The Modern Fit works really well with my athletic build.
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Jordan Davis
I am typically between a 2XL and 3XL for tops depending on the brand. WAIR recommended I size down to a 2XL, and it fit great!
Marcus Brown
I have a pear-shaped body and normally get nervous purchasing matching tops and bottoms. Their sizing app was able to detect my unique body shape and recommended a 10 in tops and a 12 in bottoms. Pretty impressive!
Taylor Johnson
I just moved to the US from Europe and the sizing is so different. I tried the size chart, but couldn’t figure it out. Finally, I used the size recommender and it worked perfectly. So happy I did… I love this jacket.
Stefan Müller
It was nice that I didn’t have to reach out to their support team about sizing. WAIR’s survey was super fast and easy.
Michelle Lee
I was so excited for this evening skirt. I normally wear a size 6 but the sizing tool recommended a size 4, and it was spot on… it fits like a glove.
Emily Carter
WAIR recommended I go with an XLarge, and it fit perfectly. I have an athletic build, so I was concerned about fit, but it was spot on.
Adrian Chen
Apparel Shopper
First time buying from this brand and glad they have sizing assistance available on their site. I never know what sizes to buy the first time around.
Daniel Green
Apparel Shopper
None of the models on their site look like me, so it was great having a tool to assist with finding my size.
Jasmine Lopez
Apparel Shopper
It’s almost like having your own stylist there to help with sizing. The body survey is very easy to complete and I love how everything fit!
Olivia Martinez
Apparel Shopper
Normally I just buy two different sizes and return the one that doesn’t fit, but I didn’t have to this time thanks to their sizing quiz.
Chris Ramirez
Apparel Shopper
I’ve never shopped with this brand so was super nervous to make the first purchase. I tried the WAIR sizing tool and the size suggested fit me perfectly.
Sophia Nguyen
Apparel Shopper
I’m tall, but with a short inseam. I entered my data into WAIR and it recommended a 30-inch inseam which fit me perfectly. I love these jeans.
Hannah Blake
Apparel Shopper
I hate going into the store to try on swimwear, definitely an uncomfortable experience. It was nice having the option to know what size will fit me best when shopping online.
Maya Patel
Apparel Shopper
Their size chart was extremely confusing. I wasn’t sure if it was showing product measurements or body measurements. Their sizing tool was much easier to use, definitely recommend going that route to find your size.
Rebecca Evans
Apparel Shopper
The pants were a lot more stretchy than I had expected. Glad I listened to WAIR’s recommendation to size down for the best fit!
Alex Thompson
The widget recommended I choose Modern Fit over their Slim fit and happy I did. The Modern Fit works really well with my athletic build.
Jordan Davis
I am typically between a 2XL and 3XL for tops depending on the brand. WAIR recommended I size down to a 2XL, and it fit great!
Marcus Brown
I have a pear-shaped body and normally get nervous purchasing matching tops and bottoms. Their sizing app was able to detect my unique body shape and recommended a 10 in tops and a 12 in bottoms. Pretty impressive!
Taylor Johnson
I just moved to the US from Europe and the sizing is so different. I tried the size chart, but couldn’t figure it out. Finally, I used the size recommender and it worked perfectly. So happy I did… I love this jacket.
Stefan Müller
It was nice that I didn’t have to reach out to their support team about sizing. WAIR’s survey was super fast and easy.
Michelle Lee
I was so excited for this evening skirt. I normally wear a size 6 but the sizing tool recommended a size 4, and it was spot on… it fits like a glove.
Emily Carter
WAIR recommended I go with an XLarge, and it fit perfectly. I have an athletic build, so I was concerned about fit, but it was spot on.
Adrian Chen
Apparel Shopper
First time buying from this brand and glad they have sizing assistance available on their site. I never know what sizes to buy the first time around.
Daniel Green
Apparel Shopper
None of the models on their site look like me, so it was great having a tool to assist with finding my size.
Jasmine Lopez
Apparel Shopper
It’s almost like having your own stylist there to help with sizing. The body survey is very easy to complete and I love how everything fit!
Olivia Martinez
Apparel Shopper
Normally I just buy two different sizes and return the one that doesn’t fit, but I didn’t have to this time thanks to their sizing quiz.
Chris Ramirez
Apparel Shopper
I’ve never shopped with this brand so was super nervous to make the first purchase. I tried the WAIR sizing tool and the size suggested fit me perfectly.
Sophia Nguyen
Apparel Shopper
I’m tall, but with a short inseam. I entered my data into WAIR and it recommended a 30-inch inseam which fit me perfectly. I love these jeans.
Hannah Blake
Apparel Shopper
I hate going into the store to try on swimwear, definitely an uncomfortable experience. It was nice having the option to know what size will fit me best when shopping online.
Maya Patel
Apparel Shopper
Their size chart was extremely confusing. I wasn’t sure if it was showing product measurements or body measurements. Their sizing tool was much easier to use, definitely recommend going that route to find your size.
Rebecca Evans
Apparel Shopper
We integrate with many other eCommerce services
The leading size recommendation platform helping apparel brands reduce returns and boost conversions.
The leading size recommendation platform helping apparel brands reduce returns and boost conversions.
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