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Celsius Tee
3 reviews
All size charts
ioMerino Size Guide
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 charts below are general and 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 take a look at our recommendations below.
For further assistance with sizing, contact us here.
If for some reason you are not 100% satisfied with the size you chose, we’ll happily offer an exchange, refund or store credit on any non-sale garments. For more about our refunds and exchange policy, click here.
Men's General Size Chart
|
|
|
XS |
S |
M |
L |
XL |
XXL |
|
Waist |
Inch |
27 |
28-30 |
32-34 |
36-38 |
40-42 |
44-46+ |
|
|
cm |
68 - 70 |
71-76 |
81-86 |
91-96 |
101-108 |
111-116+ |
|
Chest |
Inch |
32-34 |
34-36 |
38-40 |
42-44 |
46-48 |
50+ |
|
|
cm |
81.5 - 86 |
86-91 |
96-101 |
106-111 |
116-121 |
127+ |
Men'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 |
47.4 |
51.2 |
55 |
58.8 |
62.6 |
66.4 |
|
Torso Length |
65.9 |
68.5 |
71 |
73.5 |
76.1 |
78.6 |
|
Sleeve Length |
50.2 |
52.1 |
54 |
55.9 |
57.8 |
59.7 |
Men's Summit Easy Fit Hoodie
Measurements in cm.
Measurements include ribbed hem.
Sleeve length from shoulder to cuff.
|
XS |
S |
M |
L |
XL |
XXL | |
|
Pit to pit |
49.4 |
53.2 |
57 |
60.8 |
64.6 |
68.4 |
|
Torso Length |
68.9 |
71.5 |
74 |
76.5 |
79.1 |
81.6 |
|
Sleeve Length |
74.2 |
76.1 |
78 |
79.9 |
81.8 |
83.7 |
Men's Glacier Tracksuit Pants
Outside Leg measurement (including waist band).
| S | M | L | XL | XXL | ||
| Inside Leg | inch | 29 | 30 | 30.5 | 31 | 31.5 |
| cm | 74.5 | 76 | 77 | 78.5 | 80 | |
| Outside Leg | inch | 41 | 41.5 | 42 | 42.5 | 43 |
| cm | 105 | 106 | 107.5 | 109 | 110 |
Men's Pace Compression Leggings - Original
Outer leg length measure from top of waist to ankle.
Measurements in cm.
| XS | S | M | L | XL | XXL | |
| Waist | 58.9 | 64 | 69.1 | 74.2 | 79.2 | 84.3 |
| Hips | 68.9 | 74 | 79.1 | 84.2 | 89.2 | 94.3 |
| Outer Leg | 90.3 | 93.5 | 96.7 | 99.8 | 103 | 106.2 |
Men's Stride Track Pants
Leg length measurement includes ankle cuff.
| XS | S | M | L | XL | XXL | |
| Waist | 70.4 | 75.2 | 80 | 84.8 | 85.6 | 94.4 |
| Hips | 82.4 | 87.2 | 92 | 96.8 | 101.6 | 106.4 |
| Leg Length | 81.6 | 82.3 | 83 | 83.7 | 84.4 | 85.1 |
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 |
Women's Size Chart - Altitude '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 |
| 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 |
| 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 |
| cm | 84-90 | 90-96 | 96-102 | 102-108 | 108-115 | 115-122 |
Women's Size Chart - Universal, Ultra, and Horizon '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 and Horizon are 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 |
| 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 |
| 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 |
| 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 Summit Easy Fit Hoodie
Measurements in cm.
Measurements include ribbed hem.
Sleeve length from shoulder to cuff.
|
XS |
S |
M |
L |
XL |
XXL | |
|
Pit to pit |
44.4 |
48.2 |
52 |
55.8 |
59.6 |
63.4 |
|
Torso Length |
62.9 |
65.5 |
68 |
70.5 |
73.1 |
75.6 |
|
Sleeve Length |
68.2 |
70.1 |
72 |
73.9 |
75.8 |
77.7 |
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 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 |
Women's Freedom Sweatpants
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 |
| 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 |
| 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 |
| 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 |
| Leg Length |
10.5 | 13 | 15.5 | 18.1 | 20.6 | 23.2 |
Socks
All sizes are given in US Sizing
| Men's | Women's | |
| S | 4 - 6 | 5.5 - 7.5 |
| M | 7 - 10 | 8.5 - 11.5 |
| L | 11 - 14 | 12 - 15.5 |
Pace Arm warmers
Measurement given for bicep width and arm warmer length. Measure around the fullest part of your upper arm in a relaxed position.
Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.
Approximate measurements only.
| Bicep | Arm Warmer Length | |
| XS | 27 - 28 cm | 45 cm |
| S | 29 - 30 cm | 46.5 cm |
| M | 31 - 32 cm | 48 cm |
| L | 33 cm + | 49.5 cm |
Gloves
Hand Length - Measure from the top of your middle finger to the base of the palm.
Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit.
Pace Gloves:
| S | 16 cm |
| M | 18 cm |
| L | 20 cm |
Skull Cap
To measure your head circumference, take a sewing measuring tape and wrap around your head so that the measuring tape winds just above the ears, in the middle of your forehead and in the centre back of your head.
Use the chart below to determine your size. If you’re between two sizes, order the smaller size for a tighter fit or the larger size for a looser fit. Approximate measurements only.
| Head circumference | |
| S/M | 50-60 cm |
| M/L | 60-70 cm |
For further assistance with sizing, contact us here.
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More info
- 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 Men's Celsius Tee to feel good no matter how warm it gets outside.
Why you’d buy this: You want something extra lightweight for warmer weather, or you’re more prone to overheating even in cool weather and want the lightest merino thing you can get your hands on. And you want something natural. This one blends merino with plant fibre so it’s still super natural which means almost no microplastic issues when you wash it or landfill when you’ve finished with it.
As with all our clothes, the merino delivers natural temperature regulation, breathability, moisture wicking and odour resistance.
SIZE & FIT
True to size. Designed to have a casual, relaxed fit.
Model wears size medium in Dusty Navy and Light Grey Marle.
Model specs - height 181cm, chest 103cm, waist 32inch.
Model wears a size medium in Black.
Model specs - height 179cm, chest 91.5cm, waist 81cm, hips 88.3cm.
BEST FOR
Warm Weather
Hiking
Running
Yoga
FABRIC - CELSIUS
Extra lightweight 150gsm
45% Australian Merino Wool
45% Tencel
10% Nylon
BENEFITS OF MERINO
LIGHTWEIGHT
THERMO REGULATING
SUPER SOFT & COMFORTABLE
BREATHABLE
MOISTURE WICKING
ODOUR RESISTANT
NATURAL
ETHICALLY MADE
S
Shane K. (Brisbane, AU) Comfortable, great quality
Very comfortable and soft, good quality and fit.
G
Glen Daws (Sydney, AU) Comfort, fit and style
Really pleased with the fit
G
Gav (Canberra, AU) Love it
I currently own 6 different IOmerino shirts and they are by far my favourite and most comfortable shirts. This Celsius Tee is a more traditional t-shirt, but still has a close fit to the body. I'm actually wearing it right now. I use all of my IO shirts as standard shirts during the warmer months and when it cools down they become my under shirts.
These products are a little pricey, but you are absolutely getting a quality made shirt that should last you for a long time
What layer is right for you?
Got questions about what item will fit you best or which fabric is most suitable for your adventures? We’ve developed a quick guide to help make choosing the perfect layer easy.
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