Size Guide

Find Your Perfect Fit

Leggings

Measurements

Size system

SIZE	EU SIZE	BUST Measure around the fullest part of your bust, keeping the tape level across your back.	WAIST Measure around the narrowest part of your waist, usually just above the belly button.	HIPS Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.
XS	34/36EU	73-81	55-63	83-91
S	36/38EU	79-88	61-70	89-98
M	38/40EU	86-95	68-77	96-105
L	40/42EU	93-102	75-84	103-112
XL	42/44EU	100-110	82-92	110-120

Fit Tip: For optimal comfort and fit, size up when between sizes.

How to measure

01

Waist

Measure around the narrowest part of your waist, usually just above the belly button.
02

Hips

Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.

Flares

Measurements

Size system

SIZE	EU SIZE	BUST Measure around the fullest part of your bust, keeping the tape level across your back.	WAIST Measure around the narrowest part of your waist, usually just above the belly button.	HIPS Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.
XS	34/36EU	73-81	55-63	83-91
S	36/38EU	79-88	61-70	89-98
M	38/40EU	86-95	68-77	96-105
L	40/42EU	93-102	75-84	103-112
XL	42/44EU	100-110	82-92	110-120

Fit Tip: For optimal comfort and fit, size up when between sizes.

How to measure

01

Bust

Measure around the fullest part of your bust, keeping the tape level across your back.
02

Waist

Measure around the narrowest part of your waist, usually just above the belly button.
03

Hips

Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.
04

Inseam

Measure from the top of your inner thigh down to the ankle, following the inside of your leg.

Recommended Flares

Measurements

Length	Your Height	Inseam
Short	149-160	74
Regular	161-173	79
Long	174-185	84

Jackets

Measurements

Size system

SIZE	EU SIZE	BUST Measure around the fullest part of your bust, keeping the tape level across your back.	WAIST Measure around the narrowest part of your waist, usually just above the belly button.	HIPS Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.
XS	34/36EU	73-81	55-63	83-91
S	36/38EU	79-88	61-70	89-98
M	38/40EU	86-95	68-77	96-105
L	40/42EU	93-102	75-84	103-112
XL	42/44EU	100-110	82-92	110-120

Fit Tip: For optimal comfort and fit, size up when between sizes.

How to measure

01

Bust

Measure around the fullest part of your bust, keeping the tape level across your back.
02

Waist

Measure around the narrowest part of your waist, usually just above the belly button.
03

Hips

Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.
04

Inseam

Measure from the top of your inner thigh down to the ankle, following the inside of your leg.

Tops & T-Shirts

Measurements

Size system

SIZE	EU SIZE	BUST Measure around the fullest part of your bust, keeping the tape level across your back.	WAIST Measure around the narrowest part of your waist, usually just above the belly button.	HIPS Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.
XS	34/36EU	73-81	55-63	83-91
S	36/38EU	79-88	61-70	89-98
M	38/40EU	86-95	68-77	96-105
L	40/42EU	93-102	75-84	103-112
XL	42/44EU	100-110	82-92	110-120

Fit Tip: For optimal comfort and fit, size up when between sizes.

How to measure

01

Bust

Measure around the fullest part of your bust, keeping the tape level across your back.
02

Waist

Measure around the narrowest part of your waist, usually just above the belly button.

Sports Bras

Measurements

Size system

SIZE	EU SIZE	BUST Measure around the fullest part of your bust, keeping the tape level across your back.	WAIST Measure around the narrowest part of your waist, usually just above the belly button.	HIPS Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.
XS	34/36EU	73-81	55-63	83-91
S	36/38EU	79-88	61-70	89-98
M	38/40EU	86-95	68-77	96-105
L	40/42EU	93-102	75-84	103-112
XL	42/44EU	100-110	82-92	110-120

Fit Tip: For optimal comfort and fit, size up when between sizes.

How to measure

01

Bust

Measure around the fullest part of your bust, keeping the tape level across your back.

All in One

Measurements

Size system

SIZE	EU SIZE	BUST Measure around the fullest part of your bust, keeping the tape level across your back.	WAIST Measure around the narrowest part of your waist, usually just above the belly button.	HIPS Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.
XS	34/36EU	73-81	55-63	83-91
S	36/38EU	79-88	61-70	89-98
M	38/40EU	86-95	68-77	96-105
L	40/42EU	93-102	75-84	103-112
XL	42/44EU	100-110	82-92	110-120

Fit Tip: For optimal comfort and fit, size up when between sizes.

How to measure

01

Bust

Measure around the fullest part of your bust, keeping the tape level across your back.
02

Waist

Measure around the narrowest part of your waist, usually just above the belly button.
03

Hips

Measure around the fullest part of your hips and seat, ensuring the tape stays level all the way around.

How To Wear

Step 1

Step into leggings and pull to mid-thigh (like tights)

Step 2

Grip ribbed compression panels on the legs and pull upward

Step 3

Guide the ribbing so it sits right underneath your bum cheeks

Step 4

Smooth the fabric upwards in sections. Work bottom to top

Step 5

Gently pull the waistband into place & make small adjustments

Frequently asked questions

Do Thrivin products run small or large?

Thrivin products are true to size. However, because our products combine shapewear and activewear elements, the fit may feel firmer than regular activewear at first.

Does the size guide apply to all products?

The size guide applies to most Thrivin products, but some products may have specific fit notes. Always check the product description for additional sizing recommendations.

How do I choose the right size?

We recommend starting on the product detail page where you will find what the general fit of the product is.
You can also use our helpful size tool. Just fill in your details and it will recommend the best size and fit for you.
You can also have a look at our size guide here.

How do I know if the fit is wrong?

If the product feels painful, rolls excessively, or restricts circulation or movement, it may not be the right size for you.

How do shapewear and activewear fits differ?

• Shapewear-focused products offer higher compression and a more sculpting feel.
• Activewear-focused products provide support with greater flexibility for movement.
Hybrid products combine both benefits for everyday wear and workouts.

How should Thrivin products feel when worn?

Thrivin products should feel supportive, secure, and comfortable. You may notice light compression, but you should still be able to move and breathe comfortably.

Is it normal if my product feels tight at first?

Yes. Some Thrivin products may feel snug when you first put them on. This is normal and part of the sculpting design. The product should not cause pain or restrict movement.

What if I’m between two sizes?

If you’re between sizes, we generally recommend sizing up for comfort—especially if you prefer a less compressive feel. If you like a more sculpting, snug fit, sizing down may be an option depending on the product.

Contact

Still unclear or have questions?

Talk to our customer service team

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Size Guide

Leggings

How to measure

Waist

Hips

Flares

How to measure

Bust

Waist

Hips

Inseam

Recommended Flares

Jackets

How to measure

Bust

Waist

Hips

Inseam

Tops & T-Shirts

How to measure

Bust

Waist

Sports Bras

How to measure

Bust

All in One

How to measure

Bust

Waist

Hips

How To Wear

Step 1

Step 2

Step 3

Step 4

Step 5

Step 1

Step 2

Step 3

Step 4

Step 5

Frequently asked questions

Contact

Still unclear or have questions?