WAIR Size & Fit Recommendation

Size Recommendations to increase conversions & reduce returns

by Fit3D, Inc. DBA WAIR · Launched: August 2022

4.7 (29) on Shopify Used by 276 Shopify stores Built for Shopify

See which stores use it — by country, co-installs & competitive gaps → Unlock with Pro

Manage this app

Verify your developer profile to earn a badge and build trust for your app.

WAIR helps shoppers find their best size, increase conversion, and reduce costly size-based returns.

Get it on Shopify →

About WAIR Size & Fit Recommendation

WAIR helps apparel brands turn size uncertainty into confident purchases. Our AI-powered size and fit recommendations help shoppers choose the right size before checkout, increasing conversion while reducing costly size-based returns. WAIR installs directly on your Shopify store and uses real shopper inputs, product fit intent, and body data intelligence to deliver personalized recommendations. Brands also gain actionable insights into shopper bodies, fit feedback, and return risk. Personalized Size Recommendations - Increases Conversions Fit Guidance - Reduces Costly Size-Based Returns Shopper Body Insights - Improves Marketing, Inventory, and Sizing Strategy Show more Show less

Last verified: July 15, 2026 · Fresh

App details

Developer: Fit3D, Inc. DBA WAIR
Category: Store design
Pricing: Paid
Launched: August 2022
Rating: 4.7 (29) on Shopify

Key features

Size Recommendation Modal
Custom Size Recommendation AI
Product Fit Reviews
Performance Reporting and Analytics
Sizing Feedback with Shopper Body Shape

Integrations with:

Attentive, Checkout, Fuego, Klaviyo, Loop Returns, Redo, TapCart

1 plan · 7-day free trial

WAIR Standard

$125/month

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 36 Shopify App Store reviews

Use the arrows to read individual reviews

The Wair support team is extremely responsive when I reach out for help. The app has been a great addition to our website to make our customer's purchase decision easier. Would recommend to other brands.

— HUNTER BELL

Great app! The wair team is super responsive with support whenever needed. Definitely would recommend this for any apparel brand.

— GB Wear

Great product and great team to work with!

— IBEX

Big fan of the product and of the team behind it. Highly recommend the app.

— Thursday Boot Company

Troy for being so responsive! So nice to check this off our list and not have to wait weeks and weeks to get this accomplished. We really appreciate it!

— Sarah Alexandra

WAIR has enhanced our store by providing reliable and accurate sizing recommendations, improving the customer experience and reducing return rates. The support from Troy and his team has been greatly appreciate - they're always reliable and available to answer a question or troubleshoot. Highly recommend this tool!

— Johnnie-O

Easy setup and the team is attentive. Would recommend to anyone in the fashion business.

— Peter Manning New York

Really helpful in making a more consistent, easy size recommendation for our customers. Team is also very responsive and helpful in working through anything or answering questions.

— Sigrún

Excellent product. Our customers use it and we see an increase in conversions from it. Any errors or issues with the app are well taken care of with Wair's development team.

— LINKSOUL

Great product! Easy to setup, very responsive team at WAIR.

— Five Star Breaktime Solutions

Giving Wair a try on our site. So far customers seem to be utilizing it and we see some improvement in conversions. The team was really helpful in getting us up and running and quick to respond to any issues or concerns.

— Bleusalt

We’ve had a great experience working with the Wair team. Troy, Greg, and Chris are all super helpful and quick to respond. They handle sizing questions and make adjustments quickly. The app has been great for both conversion and our average order value. We highly recommend! -Sydney @ Recollection Brand

— Recollection

We’ve been trying to implement this plugin in our store for over two months now. We got stuck at the Klaviyo campaign setup - specifically on something as simple as translating a survey from English to Polish. Something that should take minutes (especially now, with AI) has been pending for two months. Neither we nor the agency helping us have received any response to our emails. For a long time...

— Petite Pants

I have not installed wair. I am not using it. I never even onboarded but I am still being charged. This smells like a SCAM!!!!! BEWARE!!!

— Treehopper

The WAIR team made the onboarding process seamless from start to finish. The setup was straightforward and turnkey, requiring little effort on our end. What stood out most was how flexible and cooperative the team was in working with us to test and validate everything before going live. Their support has been excellent, and the analytics they provide go far beyond what we’ve seen from other provid...

— Jaanuu

WAIR has been a fantastic addition to our store, providing reliable and precise sizing recommendations that genuinely enhance the customer experience. The tool effectively helps our shoppers find their ideal fit, and our customers have appreciated the guidance, especially those with unique body types. Occasionally, we’ve seen minor variances for our bodybuilding customers, but overall, the accurac...

— Hunky Tops

WAIR has been a great addition to our site. Not only has it become a valuable tool for customers, helping them find their size, it has cut down significantly on my customer service emails! The amount of time saved by not having to respond to customers confused about sizing and those who bought the wrong size, pays for itself! Highly recommend this app for apparel businesses. Shout out to Troy and...

— Portland Gear

Using WAIR for a year now on skullandbones.com. Not as intuitive for user experience as advertised. Many unhappy customers with sizing suggestions by WAIR; recent audit of my site shows that Customer frustration lies in the WAIR app experience as per my site developer Bemeir LLC.

— Skull and Bones

WAIR has made it easy for our customers to select the correct size for their body type. We are seeing less returns due to size, and converting more sales. The support is always quick to address issues. A great app and organization all around!

— Three Nails

Integrating WAIR into our brand for men Under 5'10 has been a game-changer. Its intuitive interface effortlessly predicts the perfect fit, dramatically improving our conversion rates and customer satisfaction. The accuracy of WAIR's sizing recommendations has significantly reduced our return rates, saving costs and enhancing sustainability. The responsive WAIR team continually refines the tool, en...

— Under 5'10

Overview 1 / 20