40% OFF

Astra Obsidian

Name: Astra Obsidian
Brand: AlienDose
Price: 49.0 AUD
Availability: InStock

~~$81.00~~ $49.00

Spring sale – while stocks last.

This guide has the sizing for every AlienDose product — leggings, capris, shorts, sports bras, tops, sets, jumpsuits and rompers. Here's what you'll find on this page:

Body measurements — find your size, XS to XL (AU 6–14)
How to measure — bust, waist and hips
Size advice by style — leggings, shorts, sports bras, tops, sets & jumpsuits
Garment measurements — length, bust, waist, hips and openings for sports bras, shorts and leggings

Body Measurements (cm)

All AlienDose activewear follows standard Australian sizing. Use your body measurements to find your size.

Size	AU Size	Bust	Waist	Hips
XS	6	78–81	60–63	86–89
S	8	82–85	64–67	90–93
M	10	86–90	68–72	94–98
L	12	91–95	73–77	99–103
XL	14	96–100	78–82	104–108

How to Measure

Bust: around the fullest part of your chest, keeping the tape level.
Waist: around the narrowest part of your waist, usually just above the belly button.
Hips: around the widest part of your hips and bottom, feet together.

Keep the tape snug but not tight. Measurements may vary by 1–2 cm.

Choosing Your Size by Style

Leggings & capris: go by your waist and hips. Our leggings are high-waisted and compressive. Choose your usual size for a firm, sculpting fit, or size up for a softer feel.
Shorts: go by your waist and hips. They have a second-skin, compressive fit, so the fabric stretches when worn.
Sports bras & crop tops: go by your bust. If you have a fuller bust or prefer more coverage, size up.
Long-sleeve & 3/4 sleeve tops: go by your bust. Choose your usual size for a fitted look, or size up for a more relaxed fit.
Sets, jumpsuits & rompers: these fit both top and bottom, so choose the size that matches your largest measurement.

Garment Measurements (cm)

These are measurements of the garment itself, taken flat and unstretched. Our fabrics stretch to fit your body, so these numbers will be smaller than your body measurements — use the body chart above to choose your size.

Sports Bras

Size	XS / AU 6	S / AU 8	M / AU 10	L / AU 12	XL / AU 14
Length	31	32	33	34	35
Bust	60	64	68	72	76
Underband	56	60	64	68	72

Shorts

Size	XS / AU 6	S / AU 8	M / AU 10	L / AU 12	XL / AU 14
Length	32.5	33.5	34.5	35.5	36.5
Waist	48	52	56	60	64
Hips	64	68	72	76	80
Leg opening	35	37	39	41	43

Full-Length Leggings

Size	XS / AU 6	S / AU 8	M / AU 10	L / AU 12	XL / AU 14
Length	85	86	87	88	89
Waist	48	52	56	60	64
Hips	64	68	72	76	80
Ankle opening	18	19	20	21	22

Length is measured from the top of the waistband to the hem. Capri styles are shorter — see the product page for details.

Good to Know

If you're between sizes, size up for comfort or choose the smaller size for a firmer, more compressive fit.
Fit can vary slightly between styles, so check the product description for any style-specific notes.
Some styles are only available in selected sizes. Available sizes are shown on each product page.

Questions?

Not sure which size to choose? Email us at info@aliendose.com with your measurements and the style you like — we're happy to help.

Free shipping ?

Bundle & save — applied automatically at checkout

from 2 items 20^% OFF

from 3 items 25^% OFF

4+ items 30^% OFF

DESCRIPTION

Understated in all the right ways. Impossible to ignore.

The ASTRA range brings back the chunky square acetate frame that's taken over the streets again in 2026 — inspired by luxury eyewear houses, with exposed gold metal hinges, a detail that instantly lifts any outfit. This all-black colourway is the most low-key, easy-to-style version in the collection — the essential that never lets you down.

✅ Full UV400 protection — blocks 100% of UVA/UVB rays
✅ Premium acetate frame, thick and built to last
✅ Exposed gold metal hinges — our signature detail
✅ Unisex design for everyday wear
✅ Classic square shape that never dates

🚚 Free shipping Australia-wide · 🔄 30-day change-of-mind returns · 🛡️ Lifetime warranty against manufacturing defects

DETAILS

CARE INSTRUCTIONS

Machine wash cold on a gentle cycle, inside out, with similar colours.
Skip bleach and fabric softener – they break down stretch and moisture-wicking fibres.
Line dry in the shade, away from direct sun. Avoid the tumble dryer.
Do not iron printed or bonded areas.

Astra Obsidian

$49.00 ~~$81.00~~

WHY ALIENDOSE

Loved by active people who refuse to compromise

CUSTOMER FAVOURITES

SHOP NOW

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Shop with confidence

30-day change-of-mind returns. Need a different size? Return or exchange eligible items within 30 days of delivery (change-of-mind return shipping is paid by the customer). Faulty items are always covered under the Australian Consumer Law.