A chatbot Chrome extension that predicts your clothing size


efitter is a chatbot Google Chrome extension that uses previous purchases to predict your size when shopping online. With no need to manually input data, it aggregates your size across your favourite brands to predict your perfect fit the first time around.


📏 Sizing is frustrating. efitter was born out of the frustration that millions of women have when shopping online. We end up buying two of the same item in different sizes, only to return the one that doesn’t fit.

👖 Women’s fashion has a high returns rate. Of all women’s clothing that is returned, 61% is returned due to poor fit.

🌎 The environmental impact is huge. What’s worse is returned items often end up in landfill as they can’t be resold due to super-fast fashion cycles. In the US alone, 2.3 billion kg of unsold clothes goes to landfill annually.

Rubbish sizing is killing the planet. We’re changing this by reducing the quantity of returned items that end up in landfill due to poor fit.


1. Download from the Chrome Web Store and sign in with your Google account.

2. Make sure your order confirmation emails are on that account (you can forward any receipts from other accounts).

3. Refresh your emails & start shopping. We're launching on ZARA and H&M. Simply open the efitter chatbot while you shop to learn more about your favourite products and find your perfect fit!

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Developer Information






Posted on May 25, 2021

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