Frequently asked questions

For answers to common questions about efitter, such as how our sizing technology works, how we find your size, and how to navigate the extension. It's a helpful resource for users who may have questions or concerns about using our service.

What is efitter and why is it the best way to find my size?

efitter is a Google Chrome extension that predicts your size when shopping online. With no need to enter any measurements, it is the only extension that uses your previous orders to predict your size. Cool, right?

Where can I use efitter?

efitter is available online at your favourite retailers including ZARA, Mango, ASOS brands, and House of CB. To see the full list of retailers we support, see our brand directory. We’re adding new retailers all the time so watch this space!

How does efitter work?

When you download the extension, efitter will skim through your order confirmation emails and aggregate your size across different brands. When you launch the chatbot, it will predict your size based on your previous orders and provide information about the fabrics used to make the product you are browsing.

How much does efitter cost?

efitter is completely free for our users! If you are a business, get in touch here.

What do you do with my data?

The data we collect from you ensure that the product works as expected and is tailored to each user. You can read more about this in our Privacy Policy.

When is the app launching? I can't find it on the Apple store!

efitter is a Google Chrome extension so it is only available in the Chrome Web Store.

Will you be available on more retailers soon?

Yes! We are constantly adding new brands. Want us to work with your favourite retailer? Let us know!

You're mainly on fast-fashion sites. Isn't efitter all about sustainability?

We care about educating the masses about some of the unethical practices in the fashion industry and how our small changes can make a difference. However, our research has found that the switch to ethical shopping is a gradual one. Shoppers will continue shopping at fast fashion brands such as ZARA and H&M. We exist to encourage you to make incremental changes by reducing the amount of clothes you return, to start with. We will be working more closely with sustainably-minded retailers to make it easier for you to find alternatives to fast fashion.

All of my email receipts are on my Yahoo email account. Can I still use efitter?

efitter only works on Google accounts. If you have a Gmail account, you could forward your email receipts from your Yahoo email to your Gmail email.

What if I don’t use Google Chrome? Can I still use efitter?

Unfortunately, efitter is only available on Google Chrome.

I don’t usually shop online. Can I still use efitter?

In order for efitter to work effectively, you would need a history of online purchases and to have your order confirmation emails in your inbox. efitter will start making size recommendations from your very first order.

Sometimes I buy menswear. Can I still use efitter?

efitter works best on womenswear however, if the menswear you buy uses unisex sizing, we’ll be able to help you find your perfect fit!

I live outside of the UK. Can I still use efitter?

efitter was designed to accurately predict UK sizes but the extension may also work on European sizes at some retailers.

How does efitter's Sizing Solution work?

efitter aggregates sizes across various retailers based on their size charts, then provide a size prediction based on the size chart of the retailer you are browsing on. We predict unique sizes based on whether the shopper is browsing tops, bottoms, one-pieces, or outerwear.

What sets efitter apart from other sizing solutions?

Unlike our competitors, efitter is the only solution that requires no manual input from shoppers. This means we predict their size accurately with no need for shoppers to enter their height, weight, size at other retailers, or any other information. Reducing the steps required to predict shoppers’ sizes increases uptake of our Sizing Solution in comparison to competitor solutions.

How much does the efitter Sizing Solution cost?

Our pricing packages are bespoke depending on your company's size, AOV, and current returns rate. Want to find out more? Get in touch!

How easy is it to add efitter to our website?

Integration is as simple as adding tags to your website product page and checkout - even easier if you use a tag manager! We also require a feed of your returns which can be uploaded via CSV file on a weekly basis or can be sent to us directly from your CRM via API.

Can efitter integrate with our existing e-commerce platform?

Yes! We are willing to make integration as quick and easy as possible so get in touch with us about your requirements.

How accurate is efitter's sizing prediction?

We spent the first 2.5 years of our existence in Beta aiming to create the most accurate sizing solution on the market. With our 5 star rating and NPS score of 50, we are confident that we are more accurate than our competitors but don’t just take our word for it - try efitter for yourself!

Does efitter require extensive customer data for sizing predictions?

To get the most out of efitter your customers need to have shopped with at least one of our recognised retailers which include Next, PrettyLittleThing, Adidas, Zara, and many more. The more purchases they have made, the more accurate our predictions will be.

What type of support does efitter offer during implementation and beyond?

We work closely with your technical teams to understand your requirements and ensure that the integration process is as smooth as possible. Once onboarding is completed, you will have an Account Manager assigned to you who will be your main point of contact going forward.

Is efitter's Sizing Solution customisable to our brand's specific needs?

Yes! The efitter platform allows for the chatbot to be personalised to match your branding. If you have any other specific requirements get in touch and we would be happy to accommodate you.

I know I have order confirmation emails but efitter can’t find any of them. What should I do?

1. Remember to click “reload your emails” in the extension so that we have the most up-to-date information about your past orders.

2. Double-check that any orders you have placed were from the last 12 months. To give you the most accurate size prediction, efitter will only recommend a size based on the last 12 months of orders.

3. If you are sure you have order confirmation emails from the last 12 months, you may have shopped with a brand whose emails we don’t recognise yet. Send us an email with the name of the retailer(s) you shopped with and we’ll look into it.

4. Still having issues? Get in touch and we will be happy to help.

My size prediction looks completely wrong.

efitter uses your past orders to predict your size but that might be inaccurate, especially if you share your account with someone else. In that case, get rid of any order confirmation emails that don’t belong to you, then click “reload your emails” in the extension. Remember that some retailers use European sizing which may look completely different to the sizes you are used to.

I know that my dress size has changed but my efitter prediction looks a bit small.

Since efitter uses your orders from the last 12 months to predict your size, if your size has changed in the last few months your prediction may be a  bit out of date. You can test this by using efitter on a website where you know your size and if you are recommended your old size, size up or down as appropriate.

efitter will do its best to predict your size but you know your body best - feel free to tweak your recommended size based on whether you like your clothes to fit tight or loose too.

I have a request for a new feature. Where can I leave feedback?

We’d love to hear your feedback and requests! Drop us an email or fill in our contact form and we’ll get back to you.

I still have some questions.

No problem - reach out to us and we’d be happy to help.

Still have questions?

Contact us

Sign up to our newsletter

It's 100% free and we will never send more than one newsletter per month!
By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyse site usage, and assist in our marketing efforts. View our Privacy Policy for more information.