Australian label / Midi Skirts
SIR the Label Mathias Tailored Midi Skirt in Slate
The SIR the Label Mathias Tailored Midi Skirt in Slate comes from SIR. (Separates, Intimates, Ready-to-wear), the Australian label founded in 2014 by Nikki Campbell and Sophie Coote. Coveti stocks it as part of our Midi Skirts edit, and every piece is checked for authenticity before it leaves us.
SIR the Label’s Mathias Tailored Midi Skirt is a midi skirt in lightweight wool suiting fabrication. Look for the functional wrap and wide waistband. It comes in slate. Made for lunch, the office and drinks after.
Quick Facts
- Brand: SIR the Label, Australia, founded in 2014 by Nikki Campbell and Sophie Coote, flagship store in Bondi, Sydney
- Product: Mathias Tailored Midi Skirt in Slate
- Collection: Pre-Fall 2026
- Colour: Grey
- Material: Main 50% wool, 44% polyester, 6% elastane. Lining 100% polyester
- Size and fit: Fits true to size, select your normal size. SIR sizes 0 to 4 are shown here as UK 6 to 14 (size 0P, the petite cut, as UK 4). The model is 178 cm tall and wears SIR size 1.
- Origin: designed in Australia
- Authenticity: 100% authentic SIR the Label, verified by Coveti
- Delivery and returns: the terms for your country are in the Coveti logistics and returns protocol
How to Wear the Mathias Tailored Midi Skirt in Slate
Wear the Mathias Tailored Midi Skirt with a fine knit and ankle boots. For a different look, try a fitted tank and sandals.
Good for lunch, the office and drinks after. For more ideas, browse the full SIR the Label edit.
PRODUCT DETAILS
| Brand | SIR the Label, Australia |
| Category | Midi Skirts |
| Colour | Grey |
| Material | Main 50% wool, 44% polyester, 6% elastane. Lining 100% polyester |
| Size and fit | Fits true to size, select your normal size. SIR sizes 0 to 4 are shown here as UK 6 to 14 (size 0P, the petite cut, as UK 4). The model is 178 cm tall and wears SIR size 1. |
| Care | Dry clean only, do not bleach, do not tumble dry, cool iron, cover hardware. |
| Origin | designed in Australia |
| Style code | SIR-MATHIAS-TAILORED-MIDI-SKIRT-SLATE |
About SIR the Label
SIR the Label is an Australian label founded in 2014 by Nikki Campbell and Sophie Coote. The name stands for Separates, Intimates, Ready-to-wear, and the house now has a flagship in Bondi and stores in Sydney, Melbourne, Brisbane and Perth. Its look is relaxed and grown up: silk slip dresses and bias gowns, linen and cotton for summer, sharp tailoring in wool suiting, fine knits and a swimwear line built on prints that run through the whole collection. SIR designs to its own 0 to 4 sizing, which Coveti shows on the UK ladder so you can choose with confidence.
“Few labels make a midi skirt feel this effortless. Wear it often.”
Gemma Deeks, Fashion Editor at Coveti
How SIR the Label Compares
Shoppers looking at SIR the Label often also consider
Posse,
Christopher Esber and
Aje from Australia, and
Toteme for the same pared back mood.
Frequently Asked Questions
Is the SIR the Label Mathias Tailored Midi Skirt in Slate authentic?
Yes. Every SIR the Label piece sold by Coveti is 100% authentic and is checked before dispatch.
What size should I order in the Mathias Tailored Midi Skirt in Slate?
SIR says it fits true to size, so order your usual size. SIR 0 equals UK 6, SIR 1 equals UK 8, SIR 2 equals UK 10, SIR 3 equals UK 12 and SIR 4 equals UK 14.
What is the Mathias Tailored Midi Skirt in Slate made of?
The Mathias Tailored Midi Skirt in Slate is made of Main 50% wool, 44% polyester, 6% elastane. Lining 100% polyester.
How do I care for the Mathias Tailored Midi Skirt in Slate?
Dry clean only, do not bleach, do not tumble dry, cool iron, cover hardware.
Where is SIR the Label from?
SIR the Label is an Australian label with its flagship store in Bondi, Sydney. This piece: designed in Australia.
Who founded SIR the Label?
Nikki Campbell and Sophie Coote founded SIR. in 2014. The name stands for Separates, Intimates, Ready-to-wear. The label is known for silk dresses, easy tailoring, linen and swimwear with a relaxed Australian line.
How does delivery work?
Delivery options, duties and returns depend on your country. The full terms are in the Coveti logistics and returns protocol.
More from SIR the Label at Coveti
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Complete the look
Last updated 13-Oct-26 | Curated and authenticated by Coveti
