Personalised Sizing · Powered by AI

Find your perfect fit.

Step into your personal fitting room. SizeGuide uses AI to recommend your exact size on any clothing website — like autofill, but for sizing.

Be first to access. No spam, ever.

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We'll be in touch when SizeGuide is ready for you.
Discover more
70%
of clothing returns
are due to sizing & fit
$218bn
lost globally each year
to fashion returns
86%
fashion cart abandonment
rate — sizing is #1 reason

The Real Problem

Same person.
Three different sizes.

A size 12 at one retailer is a size 8 at another. Brands all use different measurements — and none of them tell you that.

Retailer A
8
Chest 88cm · Waist 70cm
Retailer B
12
Chest 88cm · Waist 70cm
Retailer C
S
Chest 88cm · Waist 70cm

The measurements never change. The labels do.
SizeGuide knows the difference.

The Process

Three steps to
shopping confidence

01
Enter Your Measurements

Provide your measurements once. SizeGuide builds your personal sizing profile — securely stored, always yours.

02
Browse Anywhere

Shop your favourite clothing websites as normal. Our browser extension works quietly in the background across every retailer.

03
Buy with Confidence

Receive your perfect size recommendation — tailored to that specific brand, style, and cut. No more guessing.

See It In Action

From setup to perfect fit
in minutes

01
Create your sizing profile

Head to SizeGuide and create your account. Enter your measurements once — height, chest, waist, hips and more. All fields are optional, fill in what you know.

My Profile
Basic Body Measurements
Height173 cm
Chest88 cm
Waist70 cm
Hips94 cm
Save Profile
Gift Sizing
Send a link to a friend or family member — they fill in their own measurements privately.
Emma — Profile complete
·
James — Awaiting response
02
Shop for the people you love

Generate a free sizing link and send it to a friend or family member. Once they fill in their measurements, their profile appears in your account — ready for gift shopping.

03
Install the browser extension

Add the SizeGuide extension to Chrome in one click. Select your fit preference — fitted, regular, or relaxed — and choose which profile to shop for. That's the setup done.

Fit Preference
Fitted
Regular
Relaxed
Active Profile
My Sizing Profile
nike.com · Men's T-Shirt · $55
×
Your Size
S
85% confidence
The relaxed fit means size S is ideal for your measurements and height.
Alternative: M for a looser fit
View in Dressing Room →
04
Buy with confidence

Browse any clothing website as normal. SizeGuide automatically detects the product and recommends your perfect size — with a confidence score and fit notes tailored to that specific brand and cut.

Coming Soon

Your virtual
dressing room

We're building something extraordinary. Using your measurements, SizeGuide will generate a realistic AI model of your exact frame — so you can see precisely how any garment will look on you, before you buy.

Family & Friends Profiles

Shop for the people
you love

Finding the perfect gift is hard enough without worrying about whether it'll fit. SizeGuide lets you create sizing profiles for the people closest to you — so every gift lands perfectly.

Send a sizing link. Share a simple link with a friend or family member. They fill in their measurements privately — you never need to ask awkward questions.

Switch profiles instantly. Toggle between your own profile and theirs while you shop. SizeGuide recommends the right size for whoever you're buying for.

Give with confidence. Birthdays, Christmas, anniversaries — never return a gift because of sizing again.

Active Profile
Sarah — Partner
Profile complete · Size recommendations ready
Profile
James — Brother
Invite sent · Awaiting measurements
Profile
Mum
Profile complete · Size recommendations ready

Why SizeGuide

Built for how
real people shop

Works everywhere

One profile. Every retailer. No more brand-by-brand size charts or hoping for the best.

Truly personalised

Not just height and weight. SizeGuide understands your body proportions and fit preferences.

Fewer returns

Better for your wardrobe. Better for the environment. Better for the planet.

Private by design

Your measurements are yours. We never sell your data or share it with retailers.

Be first in the fitting room

Join the waitlist

SizeGuide is coming soon. Join the waitlist for early access, founding member perks, and a first look at the virtual dressing room.

No spam. Unsubscribe any time.

You're on the list.

We'll be in touch when SizeGuide is ready for you.