Red Run Size Guide: How the Ranges Fit

1 | The Short Answer — How Red Run Runs

Red Run cuts for movement: a sculpted, athletic shape rather than a boxy high-street fit. In our experience selling it daily, most people order their normal sportswear size and it lands right — the four-way stretch in the leggings, bras and trousers does the adjusting for you. The brand's own guidance, which matches what we see on the shop floor, is true to size for the sculpted fit, and size up if you sit between sizes.

The sizes themselves are worth knowing before you browse, because Red Run uses lettered sizing rather than UK dress sizes on its listings:

Those ranges are taken from the live size selectors on our Red Run product pages, checked June 2026 — not from a generic brand chart. Note that Red Run's printed size chart references UK dress-size equivalents up to UK 18, but the sizes actually listed on current women's stock run XXS to XL, so that's the range we'd plan around. If a size you need isn't showing, it's worth a call — stock moves between the floor at 44 Barrow Street and the website daily.

2 | Women's Sizes Stocked — Category by Category

Every women's Red Run category we checked runs the same six-size span: XXS, XS, S, M, L and XL. That consistency is genuinely useful — once you know your Red Run size in one piece, it should carry across leggings, bras, shorts and jackets alike. Here's what the live listings show:

For converting from a UK dress size, Red Run's own chart — reproduced in our main Red Run brand guide — maps the stocked letters like this:

Two practical notes from the shop floor. First, the sports bras follow the same XXS–XL dress-size logic rather than cup sizing — the strappy cross-back styles carry removable pads and a wide underbust band, so they're more forgiving across cup sizes than a structured bra would be, though we'd still suggest the support level suits training rather than high-impact running for fuller busts. Second, the bodysuits, woven track pants and other capsule pieces rotate seasonally — sizing on those follows the same lettering, but check the live listing before setting your heart on a size.

3 | Men's Sizes Stocked — Tees, Shorts & Tracksuit Sets

The men's Red Run range runs one notch larger at each end of the alphabet: XS, S, M, L, XL and XXL on every men's listing we verified. The current men's line is built around three collections — Midnight Moss, Crimson Wave and Carbon Impact — covering technical tees, track jackets, quarter-zips, trousers, shorts and joggers.

The detail that matters: set sizing is independent

This is the one we'd flag above everything else for men. On the Red Run tracksuit set pages, the jacket size and the trouser size are two separate dropdowns — the Midnight Moss jacket-and-trouser set we checked lists all thirty-six jacket/trouser combinations, from an XS jacket over XXL trousers to the reverse. If you carry size through the shoulders but not the leg (or vice versa), you don't need to compromise or hunt for separates: pick each half in its own size on the set page.

Fabric-wise, the men's pieces we verified are built for training: the Midnight Moss tee is a lightweight 100% polyester short-sleeve runner tee, the set jacket is described as breathable, sweat-wicking and odour-repellent, and the matching technical trouser is a four-way stretch polyester-elastane blend with an adjustable waist. That adjustable waist gives the trousers more tolerance across sizes than most joggers — useful if you're hovering between two letters.

4 | Fit by Range — Sky Volt, Skyline, Elements & the Men's Collections

Red Run names its drops, and the names carry fit information once you know how to read them. Here's how the ranges on our shelves break down — based on the product labelling and what we see when customers try them on.

On the legging fit names: Sculpt / Sculptured is the contouring, compression-style fit — the label Red Run puts on its signature legging — while Perky is the lift-focused cut. Both run true to size in our experience; neither needs sizing down to feel supportive, because the elastane content does that work. If you want the full story on the fabric technology behind these ranges — the four-way stretch, moisture-wicking yarns and shape retention — that lives in the main Red Run brand guide.

5 | Leggings Fit & Length — Sculpt vs Perky, Regular vs 7/8

Leggings are what Red Run is best known for, and they're where most sizing questions land. Two decisions to make — fit and length — and both are printed right in the product name.

Decision one: the fit

Sculpt (or Sculptured) is the signature contour legging. The pair we verified — the Sky Volt Sculpt Regular — is 80% polyamide / 20% elastane, with four-way stretch, a wide elasticated waistband, an elevated waistline, flat-lock seams and a side pocket. That elevated waist plus wide band is why the Sculpt holds its line through movement without digging in. Perky shares the size range and the stretch construction; the cut is built around lift through the seat. In our experience customers pick between them on feel rather than size — your letter stays the same in both.

Decision two: the length

Most Red Run leggings come in two lengths, listed as separate products: Regular and 7/8. The brand's own steer, which matches what we tell customers in the fitting room, is simple: 7/8 if you're 5'4" or under, Regular for taller builds. The 7/8 finishes at the ankle on shorter frames rather than bunching; on taller frames it reads deliberately cropped. The Elements flared legging follows the same logic, with a 7/8 flare available alongside the full-length version.

One more practical point: every Red Run legging listing at OD's carries our Verified Size Information — Live Check note. We hold the stock physically at 44 Barrow Street, and our team will measure the actual garment — waist, inseam, rise — on request before you order. No generic chart guesswork.

6 | Tracksuit Set Sizing — Mix Your Sizes on One Page

The sets are the smartest-engineered part of Red Run's sizing, and it's worth spelling out because most brands don't do this. On a Red Run set page — women's or men's — you'll find a separate size selector for each garment in the set. We verified this on the women's Skyline Track Jacket & Sculptured Legging Set (jacket XXS–XL and legging XXS–XL, independently selected) and the men's Midnight Moss jacket-and-trouser set (jacket XS–XXL, trouser XS–XXL, all thirty-six combinations listed).

In practice that means:

• A medium top over small leggings — or any other split — is a standard order, not a workaround.
• Oversized-top styling works within the set. The Skyline oversized tee and sculptured legging set, for instance, lets you go up in the tee while keeping your true legging size.
• You're not locked to sets at all. Nearly every set piece is also sold as a separate — jackets, leggings, bras, shorts, tees — so you can replace one half later or build a mixed-colourway outfit from the full collection.

Which route is better? If you want the matched look in one order, the set page with its independent size pickers is the easy answer. If you already own half the outfit, or you're combining ranges — say a Sky Volt jacket over Skyline leggings — buy separates. Sizing carries across ranges in our experience, so your Skyline letter is your Sky Volt letter.

7 | Between Sizes? Our Advice

This is the question we answer most across the counter, so here's the honest shop-floor version.

Default: size up. Red Run's own guidance says it, and our returns experience backs it. The sculpted cut means the smaller of two sizes can feel like a compression garment — fine if that's what you want, but most people want supportive rather than strict. The four-way stretch in the leggings, bras and technical trousers recovers its shape, so the larger size won't go slack with wear.

Exceptions worth knowing. The oversized tees and cropped sweatshirts are already cut generously — take your true size there, since sizing up doubles the effect. The men's technical trousers have an adjustable waist, which buys you tolerance if you're between letters on the bottom half. And anything labelled "relaxed" — like the woven pieces in the seasonal capsules — is loose by design.

When in doubt, ask us before you order — not after. Three ways, all quick:

• Phone: 01744 730985, Mon–Sat 9–5. Tell us your height, your usual size in another brand, and the piece you're looking at — we'll pull it off the rail and measure it while you're on the line.
• WhatsApp: message us with the product name and your usual size — we'll reply with a straight recommendation.
• In store: 44 Barrow Street, St Helens. Fitting room on site, the current Red Run range on the rail, and staff who sell it every day.

And if a size still doesn't work out, standard returns apply with fast UK delivery both ways online — details on our delivery page.

8 | Where to Buy Red Run — Why OD's

OD's Designer Clothing is an authorised UK Red Run stockist. We've traded from 44 Barrow Street, St Helens since 1992 — call 01744 730985, Mon–Sat 9–5 — and hold a ★★★★★ 4.6 rating from 2,388 Reviews.io customer reviews. We stock Red Run in depth: women's and men's ranges, sets and separates, in store and online.

Three Red Run pieces to start with — live prices and stock, straight from the shelf:

Shop Now

Shop Now

Shop Now

See the full range: Shop all Red Run at OD's →

• Authorised UK Red Run stockist — women's and men's ranges, sets and separates
• Try before you buy at 44 Barrow Street, St Helens — sizes on the rail, fitting room on site
• Garment measurements taken from physical stock on request — call before you order
• Straight sizing answers from a team that sells Red Run daily
• Fast UK delivery and standard returns
• Stock checked by phone in seconds — 01744 730985 before you travel

9 | Frequently Asked Questions