UK Shoe Size Guide: ASICS, Nike & Saucony

Buying trainers online can be difficult, especially when every brand fits slightly differently. At StyleSwap Ltd, we want to make choosing the right size as easy as possible. Whether you're buying running shoes, lifestyle trainers or limited-edition releases, this guide will help you understand how ASICS, Nike and Saucony sizing compares.

Use this guide alongside our size chart to ensure you get the perfect fit the first time.

Do Shoe Sizes Differ Between Brands?

The short answer is yes.

Although UK shoe sizes follow a standard measurement, each manufacturer designs shoes differently. Factors such as:

• Width

• Toe box shape

• Cushioning

• Materials

• Intended use

This can all affect how a shoe feels on your foot. This is why a UK 9 in one brand may feel slightly tighter or looser than another.

Nike Shoe Sizing Guide

Nike trainers generally fit true to size, making them one of the easiest brands to shop online.

However, certain performance models have a narrower fit than casual trainers.

Nike Fit

- True to size for most people

- Narrow fit on some running models

- Great for normal-width feet

- Wide-footed customers may prefer going up half a size

Our Recommendation

If you've owned Nike trainers before, we recommend ordering your usual UK size. If you have particularly wide feet or prefer a roomier fit, consider half a size up.

ASICS Shoe Sizing Guide

ASICS is well known for producing comfortable trainers with excellent support.

Most ASICS trainers fit true to size, although many customers find them slightly more spacious than Nike.

ASICS Fit

- True to size

- Slightly wider toe box

- Excellent arch support

- Comfortable for everyday wear and running

Our Recommendation

If you normally wear Nike, you'll usually wear the same UK size in ASICS but they are known to have a roomier fit so some people take half a size down. Those with wider feet often find ASICS more comfortable without needing to size up.

Saucony Shoe Sizing Guide

Saucony trainers are designed primarily for running, comfort and long-distance performance.

Sizing is generally true to size, but many running shoes have a slightly longer fit.

Saucony Fit

- True to size

- Slightly longer shape

- Comfortable toe room

- Excellent cushioning

Our Recommendation

Order your usual UK size. If you're between sizes, staying with your normal size is usually the best option due to the slightly longer fit.

Tips for Finding the Right Shoe Size

- Before ordering online, we recommend:

- Measure your feet at the end of the day.

- Wear the socks you normally use.

- Compare your measurements with the manufacturer's size guide.

- Leave around a thumb's width of space at the front of the shoe.

- If you're between sizes, choose based on the brand's fit characteristics.

Frequently Asked Questions

Do Nike trainers run small?

Most Nike trainers fit true to size, although some performance models are slightly narrower.

Are ASICS wider than Nike?

Generally, yes. ASICS trainers often provide a roomier toe box, making them a popular choice for wider feet.

Should I size up in Saucony?

Usually no. Saucony trainers fit true to size, although many models have a slightly longer shape.

Can shoe sizes vary between models?

Yes. Different collections within the same brand can fit differently due to design, materials and intended use.

Shop Trainers at StyleSwap Ltd

At StyleSwap Ltd, we stock a wide range of premium trainers from trusted brands including Nike, ASICS and Saucony. Whether you're looking for everyday comfort or the latest releases, we're here to help you find the perfect fit.

Use this guide alongside our UK shoe size chart before ordering. If you're still unsure about sizing, feel free to contact us. We're always happy to help.