Celsius Tee

Fabric Guide Size Guide

Women's Size Chart

Click here to learn more about our different fits and how to choose the size that's right for you.

We strive to make all our products true to size. The sizing chart below is not garment specific, but hopefully, it will give you some guidance when choosing your size. In instances where you’re perhaps in between two sizes then we recommend you take the size up.

For further assistance with sizing, contact us here.

Women's Size Conversion Chart

	XS	S	M	L	XL
Australian	6-8	8-10	10-12	12-14	14-16
US	2-4	4-6	6-8	8-10	10-12
European	34-36	36-38	38- 40	40-42	42-44

Altitude Range - 'Contact Fit'

The Altitude range is designed to be a tight, but comfortable, fit. If you size up it will give you a little extra room, but it will still hug your body as that’s what this range is designed to do. If you want a looser fit consider the Ultra or Universal range.

		XS	S	M	L	XL	XXL
Bust	inch	30-32	32-34	34-37	37-40	40-42	42-45
Bust	cm	76-82	82-88	88-94	94-100	100-107	108-114
Waist	inch	24-26	26-28	28-30	30-32	32-35	35-38
Waist	cm	58-64	64-70	70-76	76-82	82-89	89-96
Hips	inch	34-36	36–38	38-40	40-42	42-44	44-47
Hips	cm	84-90	90-96	96-102	102-108	108-115	115-122

Universal and Ultra Range - 'Regular Fit'

These garments are designed true to size, but going up a size in the Ultra will give it a slightly looser fit, whilst remaining sporty. The Universal is already designed as a more casual fit.

		XS	S	M	L	XL	XXL
Bust	inch	29.5–32.5	32.5–35.5	35.5–38	38–41	41–44.5	44.5–48.5
Bust	cm	75-82.5	82.5-90	90-96.5	96.5-104	104-113	113-123
Waist	inch	23.5–26	26–29	29–31.5	31.5–34.5	34.5–38.5	38.5–42.5
Waist	cm	60-66	66-73.5	73.5-80	80-87.5	87.5-94.5	97.5-108
Hips	inch	33–35.5	35.5–38.5	38.5–41	41–44	44–47	47–50
Hips	cm	83.5-90	90-97.5	97.5-104	104 -111.5	111.5-119.5	119-127

Women's Summit Zip Hoodie

Measurements in cm.

Measurements include ribbed hem.

Sleeve length from pit to hem.

	XS	S	M	L	XL	XXL
Pit to pit	41.4	45.2	49	52.8	56.6	60.4
Torso Length	60.5	63	65.5	68.1	70.6	73.2
Sleeve Length	47.9	50.5	53	55.5	58.1	60.6

Women's Stride Tracksuit pants

Measurements do not include the ankle cuff.

Please keep in mind the style of these pants is slightly drop crotch.

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Leg Length	56.4	57.6	58.8	60	61.2	62.4

Women's Freedom Sweatpant

Outside leg measurement includes waist band.

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	68.4	73.2	78	82.8	87.6	92.4
Hip	94.4	99.2	104	108.8	112.6	118.4
Outside Leg	95.6	96.8	98	99.2	100.4	101.6

Women's Pace Compression Leggings - Original

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Inner Leg Length	60.5	63	65.5	68.1	70.6	73.2

Women's Pace Compression Leggings

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Inner Leg Length	60.5	63	65.5	68.1	70.6	73.2

Women's Pace 3/4 Compression Leggings

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Inner Leg Length	42.2	44.8	47.3	49.8	52.4	54.9

Women's Pace Bike Shorts

Measurements in cm.

	XS	S	M	L	XL	XXL
Waist	72.4	77.2	82	86.8	91.6	96.4
Hip	98.2	104	108.8	113.6	118.4	123.2
Inner Leg Length	10.5	13	15.5	18.1	20.6	23.2

Women's Yoga Pants

Measurements in cm.
Outer Leg Length includes from the top of the waist to the bottom of the pant leg.

	XS	S	M	L	XL	XXL
Waist 1/2 measurement	34	36.5	39	41.5	44	46.50
Hip 1/2 measurement	40	42.5	45	47.5	50	52.5
Outer Leg Length	106.8	108	109.2	110.4	111.6	112.8

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DETAILS
SIZE & FIT
BEST FOR
FABRIC - CELSIUS

DETAILS

We know what you’re thinking: how will a merino Tshirt keep me cool when it’s warm? Well, we’ll tell you! We’ve blended our softest, finest merino, together with a special blend of plant fibre, to come up with a fabric that will keep your core comfortable and cooler for longer when the temperature rises.

The Celsius Tee is part of our Summerino range, and it features our coolest ever fabric, that is naturally breathable, temperature regulating, moisture wicking and odour resistant - and feels ridiculously good next to your skin.

It’s designed to be worn in milder to warm weather, but really the easy fit delivers performance and comfort all year round. Whether you’re pushing hard, doing not much at all, or something in between, go with the io Women's Celsius Tee to feel good no matter how warm it gets outside.

The Celsius Tee has a versatile and relaxed fit, with a drop back hem for extra coverage.

Pair with a Zodiac Crop Top to maximize comfort, style and MicroMerino® performance.

SIZE & FIT

Designed to have a casual, relaxed fit. True to size.

Model wears size medium in Black.
Model specs - height 164cm, chest 90cm, waist 70cm, hips 95cm.

Model is 5'8" and wears size small in Dusty Navy, Blush, and Light Grey Marle.

Size Guide. Casual Fit.

BEST FOR

Warm Weather

Hiking

Running

Yoga

FABRIC - CELSIUS

Ultra-lightweight 150gsm.

Super cool, super lightweight and silky smooth, made from 45% ultra fine merino, 45% natural TENCEL (made from sustainably grown wood fiber), and 10% nylon for extra durability.

While Merino is an amazing natural fibre, not all Merino fabrics are created equal. At ioMerino, we make our own fabrics, using only the best quality fibres, and to very specific specifications that make the most of the natural benefits of Merino. All of them are 'Merino rich’. No cheap blends passed off as Merino. No cheaper scratchy fibres or synthetic substitutes to save money. No unethical production. And each fabric is made for a specific purpose. So if you see something with a small amount of elastase or nylon added, or blended with natural, sustainable TENCEL, you can be sure it absolutely needs to be there to make a better, more comfortable product - not to save us money.

It took every bit of our 140 years of experience in the wool industry to perfect our fabrics, but we think you’ll agree the end result was more than worth the effort.

Ethically Made. Ethically Sourced. Perfectly Natural.

BENEFITS OF MERINO

LIGHTWEIGHT

THERMO REGULATING

SUPER SOFT & COMFORTABLE

BREATHABLE

MOISTURE WICKING

ODOUR RESISTANT

NATURAL

ETHICALLY MADE

Love the tops I purchased cool and comfortable have worn them to gym and bike ride

Great product. And it’s Australian & it’s pure wool!!

Cool, soft & comfy

Appropriate for casual, work or play. These t-shirts are cool, soft & comfortable for every occasion.

Awesome

Can't believe how quickly this arrived. It is so comfy and fits perfectly. I'm a 16 and the 14-16 is still loose fitting on me so doesn't show off my bumps.

Perfect for summer

So soft and comfortable for summer runs

So comfy and no smell

I bought this shirt for a week camping adventure in the bush with no washing facilities. I put the no smell claim to the test and it didn’t disappoint. Wore this for 5 days in a row and no smell whatsoever. The fabric was lovely and comfy and not hot even in Australian summer. Loved this shirt!!

1 2

Instagram

Awesome

One of my specific reasons for buying the polo, apart from wearing it casually, I wear it under my yellow protective clothing as a volunteer firefighter. It is extremely comfortable in very hot conditions as it does not stick to your skin when sweating heavily and with the wicking ability helps with managing my body heat. Being wool it also gives that second level of protection against burn injuries.

D.L.

03/25/2023

Universal Polo

foot huggers

The socks are soft, comfortable and fit like a glove, a perfect sock to wear with boots.

D.L.

03/25/2023

Hiking Socks

Amazing!

I have stopped wearing leggings under my skirts for awhile now because of all the synthetic fibers and I decided to get these after a very long search to find the best. After about 1.5 months of searching and reading reviews I decided to get these. I followed the size guide and I found a perfect fit, I never want to take them off. Now I wear long, mostly ankle length skirts and I run in them so I sweat and I sweat a lot but these are amazing. I also have very stretched out skin from having children and these really hold things tight so my skin doesn't hurt when I run or itch. So pleased! I'm super excited to get a second pair but I need to save a bit for them. They also keep their shape after a couple days. I'm so thankful!

Customer

03/23/2023

Pace Compression Leggings - Original

Comfy undies

Fantastic undies for hiking and love the hot pink

Teresa Ukrainetz

03/22/2023

Altitude Brief - Ready For Adventure

Excellent - Love wearing the yoga pants

Great fit, fabric is light and warm
Very comfortable for travelling on long haul flights
Nice to relax around the home in too

Donna

03/21/2023

Yoga Pants

Great trackies

These track pants are a delight to wear. They are light comfortable and easy to wear during any activity. They also wash well. Also smart enough to wear while just out and about.

BRYAN CULLUM

03/21/2023

Stride Tracksuit Pants

Perfect for travel

These yoga pants were perfect for my recent trip to the UK. Comfortable all the way during the long flight and perfect for the cold weather there on arrival. I wore them the whole time I was away and they didn’t crease, lose shape or go baggy in the knees! Am about to buy another pair…

Jillian

03/21/2023

Yoga Pants

Comfort & Style

Beautiful fit. Very comfortable. Bought the set and pleased I did.

Deirdre

03/20/2023

Freedom Sweatpant

Perfection

True to size. Ultra comfortable. Perfect colour match to pants. Super pleased.

Deirdre

03/20/2023

Freedom Sweatshirt

truly excellent underwear

comfy, wicking, long-wearing, dry fast, look great - what else do you need?

CKA

03/17/2023

Ultra Trunks

Great fit, feels good will definitely buy another

Janis

03/17/2023

Universal Tee

the best trunks on the market

being an avid supporter of the merino industry and io merino product i purchased 3 pairs of the mens trunks about 12 months ago- it was not long before i dreaded wearing the cotton brands i was wearing prior to that. I then purchased enough IO mens trunks to ensure i had 100% comfort 100% of the time.

martin moses

03/16/2023

Ultra Trunks

Fabulous hoodie and amazing service!

I’ve been after a good hoodie for a while and had my eye on this. I bit the bullet on Monday, called up, got great service over the phone and when I got home from work today it had arrived! The hoodie itself is feels so soft, fits great and the quality is amazing. Now considering buying a different color! Thanks IO!

R.D.

02/08/2023

Summit Zip Hoodie

New Running Long Sleeve

Only used a couple of times but it’s great. Comfortable fit keeps me warmer than a t shirt and the thumb holes help keep fingers warmer on frigid hills mornings. Time will tell for durability. Love the colour (mint I think)

colin green

01/23/2023

Ultra Crew Neck

No Show Socks

Most comfy socks I’ve ever worn - love wearing them

Jules D

01/22/2023

No Show Socks

Celsius Tee