How Does Sizing Vary by Store for Shorts?

Shorts sizing varies dramatically across stores, with a UK size 10 measuring anywhere from 27.5 to 30 inches at the waist depending on the brand—that's a 2.5-inch difference that can mean the gap between perfect fit and constant adjusting. After years of styling clients and analysing sizing charts across hundreds of retailers, I can tell you that understanding these variations is absolutely crucial for online shopping success.

The Sizing Reality Check

Here's what I've discovered: high street brands take wildly different approaches to shorts sizing. M&S tends to cut their size 8 shorts with a 25.5-inch waist, whilst COS size 36 (also a UK 8) measures 68cm—that's nearly 27 inches. Meanwhile, Levi shorts in a size Small accommodate waists from 28-29 inches. That's a potential 3.5-inch variance in the same "size"!

The confusion multiplies when brands use different sizing systems. H&M bundles sizes together, so their Small fits both UK 8-10, with waist measurements spanning 66-74cm. Next also groups sizes, but their Small only covers sizes 8-10 with slightly different measurements. It's enough to make your head spin.

Why the Discrepancy?

Several factors create these sizing inconsistencies. Firstly, brands target different demographics—Whistles and Reiss cater to a slimmer contemporary fit, whilst Gap offers more relaxed American sizing. Fabric composition matters enormously too. Jersey shorts with elastane have more give than rigid denim or cotton twill, so brands adjust their sizing accordingly.

The rise and length of shorts also impact how sizing translates. High-waisted styles from Zara might fit snugly at the natural waist but feel roomy through the hips, whilst mid-rise options from Mango distribute fit differently across your body.

Navigating High Street Sizing

I always recommend starting with brands you know. If ASOS size 10 shorts fit you perfectly, that's your baseline—but don't assume size 10 works everywhere. ASOS cuts their size 10 with a 28-inch waist, which aligns closely with All Saints size Medium (28-inch waist), but Massimo Dutti may run smaller with their European sizing approach.

For denim shorts specifically, Topshop offers brilliant options but their sizing can run small through the waist. I often suggest sizing up if you're between sizes. River Island provides good consistency with their petite, regular, and tall ranges, though their standard fit tends toward the generous side.

Premium Brand Considerations

Moving into premium territory, brands like Me&Em deliver exceptional quality with more forgiving cuts—their contemporary sizing suits real bodies rather than sample sizes. Mint Velvet shorts run true to size with excellent fabric that maintains shape, making them worth the investment.

Citizens of Humanity denim shorts are legendary for good reason. They use inch-based sizing rather than UK sizes, which provides more precision. A 28-inch waist means exactly that, with minimal stretch. Similarly, Paige denim shorts offer accurate sizing, though they're cut with American proportions—slightly more room through the hips and thighs.

I'm particularly fond of Whistles for tailored shorts. Their sizing runs slim but consistent, and the quality of construction means they hold their shape beautifully. For independent brands offering something different, Rixo creates gorgeous printed shorts with a vintage-inspired fit—they run true to size with comfortable high-waisted cuts. Another gem is Kitri, a London-based brand offering contemporary shorts with European sizing that's reliable and well-drafted.

Luxury Designer Options

At the luxury end, Gucci shorts typically run small—I always advise sizing up. Their Italian sizing translates differently to UK measurements. Chloé offers beautifully cut shorts that run true to European sizing, with generous proportions through the leg.

Stella McCartney maintains consistent sizing across her collections, with shorts cut in a modern, slightly relaxed silhouette. The quality and sustainability credentials make them investment pieces that last seasons.

My Professional Fitting Tips

Always measure yourself properly before ordering. Take your waist measurement at your natural waistline (typically the narrowest part of your torso), and your hip measurement at the fullest part. Keep these numbers handy and compare them to each brand's size guide.

Pay attention to fabric content. Shorts with 2-5% elastane offer forgiveness if you're between sizes, whilst 100% cotton or linen styles require precise sizing. Check the rise measurement too—high-rise shorts need to accommodate your waist-to-hip drop differently than low-rise styles.

If a brand offers reviews, read them religiously. Comments about "runs small" or "generous fit" are gold dust. I've saved countless clients from returns simply by checking customer feedback first.

The Multi-Brand Shopping Strategy

Smart shoppers maintain a sizing record across their favourite brands. Once you've cracked the code—knowing you're a size 10 in Cos, size 12 in Zara, and size Medium in Levi—online shopping becomes infinitely easier. However, sizing can shift between seasons as brands adjust their fits, so staying vigilant matters.

For special occasion shorts or investment pieces, I recommend using precise body measurements rather than relying on size labels. This approach particularly benefits those shopping across international brands where UK, US, and European sizing systems collide.

How Tellar Makes Sizing Simple

This is precisely why Tellar.co.uk exists—to eliminate the guesswork from sizing across different stores. As the UK's leading sizing tool, Tellar matches your body measurements to over 1,500 brands instantly, so you never need to consult another size guide again.

Here's how it works:

Measure once using your bust, waist, and hip measurements, or input your existing size from a brand you know fits well.

Use the Store Size Lookup tool to instantly discover your precise size in any brand—whether you're shopping at COS, Reiss, Mango, or any of the 1,500+ retailers in the database.

Always free, with no downloads required—everything works seamlessly in your browser.

Explore the Tellar Fashion Hub, a comprehensive library of styling posts from experienced stylists. Get honest, unbiased, independent advice on everything from jeans trends for 2025 and 2026 to the ultimate guide to dresses and jacket styles. Plus, dive into the ultimate clothing sizing guide for comprehensive information on navigating sizing across all garment types.

The days of ordering three sizes hoping one fits are over. Tellar puts precise sizing at your fingertips, transforming online shopping from frustrating lottery into confident, successful purchases. Whether you're hunting for perfect denim shorts or elegant tailored styles, knowing your exact size in every store changes everything.