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, Ultra, and Horizon 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 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
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 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 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

light and gorgeous piece

It keeps my neck warm even though it is light plus I love the materials and the colors are great. I am just in love with it.
I love the color combinations from IO. it is so different and beautiful to wear, it is also great that the logo is not in your face so people always ask where did you get that.

Clothes pamper the skin

Great quality of clothes. I really love it and it is technology also as it works for all the climates.
Thank you

Great socks

Wearing these socks feels like walking on a cushion of air. Very comfortable and feel great on the feet, highly recommended 👌 another purchase on the way.

Love it! Will buy more.

I have always bought Universal Tees and I wear them daily in summer. I bought the Altitude Tee - Southern Cross as underwear that could be outerwear if I needed it to be.
The shorter sleeves, close fit and slightly lower neckline were perfect when I wore it under a long sleeved top recently. I'll buy more of these "double duty" t-shirt/underwear Altitudes. Love the Southern Cross on the shoulder too and would purchase the Southern Cross version in different colours if available (navy, red or mint green would be good!).

Hey Natalie! Thank you so much for your review of the Southern Cross Altitude Tee. We can do this design on any of the Altitude Tees. Just contact Coby at hello@io-merino.com and he'll be able to sort it for you :)

The best!

I have actually owned these shorts for many years (and I'm only just reviewing them - slacker that I am!).
I love them! So soft and comfy, pockets I never knew I needed (and now can't live without) and non-smelly! During covid lockdowns they were were my lunchtime walk shorts. I wore them for my 20 min walk around the block every day while working from home. The benefits of the non-smelly feature is that I didn't have to wash them very often, so could just let them air out overnight and throw them on again the next day. And the pockets mean I could put my phone in one, keys in the other and I'm ready to go. Very convenient. I have also worn them for longer day hikes and they were perfect. Love these shorts! :)

Great t-shirt

This shirt is very comfortable and I love the colour.

Thank you for reviewing our Fusion 140 Tee :) It's naturally comfortable.

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Women's Size Chart

Women's Size Conversion Chart

Altitude Range - 'Contact Fit'

Universal, Ultra, and Horizon Range - 'Regular Fit'

Women's Summit Zip Hoodie

Women's Summit Easy Fit Hoodie

Women's Stride Tracksuit pants

Women's Freedom Sweatpant

Women's Pace Compression Leggings - Original

Women's Pace Compression Leggings

Women's Pace 3/4 Compression Leggings

Women's Pace Bike Shorts

Women's Yoga Pants

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