ASICS Sizing UK: Size Chart & Fit Guide for Popular Models

Finding the right ASICS size can be confusing when one retailer shows UK sizes, another shows EU sizes and a product box lists US and centimetre measurements. This ASICS sizing UK guide explains how to read the conversions, how to measure your feet and what to check before buying popular ASICS trainers such as the GEL-1130, GEL-KAYANO 14, GEL-NYC and GEL-VENTURE 6.

If you already know your size, browse the ASICS trainers collection at Forever Sourcing and filter the available styles by UK size.

Do ASICS Trainers Fit True to Size?

Many ASICS trainers can be bought using your usual UK shoe size as a starting point. However, true to size is not a universal promise: fit varies with the shoe’s last, width, upper, your foot shape and whether you want a snug athletic feel or a little more room for everyday wear. A size that feels comfortable in a slim lifestyle model may feel different in a rugged trail-inspired pair.

A practical starting point is to measure both feet, check the ASICS chart for the correct men’s, women’s or youth category, and then read the exact product listing. If you already own an ASICS pair that fits, compare its UK and centimetre labels rather than guessing from a different brand.

ASICS UK Size Chart: Men’s and Unisex Conversion

The reference below shows common men’s/unisex ASICS size-label conversions. It is a conversion reference, not a promise of the interior shoe length. Always verify the label of the style you are purchasing, particularly women’s-specific and junior releases.

Source reference: ASICS size and fit guide; men’s/unisex conversion values cross-checked against published ASICS chart reproductions. See the official chart before checkout, as categories and product labels can differ.

Official sizing reference: ASICS UK size and fit guide.

What About Women’s ASICS Sizes?

Women’s and men’s ASICS size charts are not interchangeable, especially for US-size conversions. If a pair has a women’s (W) product designation, select the women’s chart rather than converting from the men’s table above. The same UK number does not automatically mean the same shape or width across categories. Check whether the listing is women’s, men’s/unisex or junior before ordering.

How to Measure Your Feet for ASICS Trainers

For the most useful result, measure your feet while standing, ideally later in the day when they may be slightly larger. Wear the type of socks you will use with your trainers.

1. Put a sheet of paper against a wall on a level floor and stand on it with your heel gently against the wall.
2. Mark the end of your longest toe and measure from the wall edge to that mark in millimetres.
3. Repeat for your other foot and use the longer measurement as your reference.
4. Compare that measurement with the correct ASICS size guide and consider the space you prefer around your toes.
5. Check the shoe’s width and model-specific advice; a tight forefoot is not always solved by increasing shoe length.

Do not confuse a CM value on a shoe-size label with a measurement of the shoe’s internal cavity. Conversion systems label the size; fit still depends on construction.

ASICS Sizing by Model: Which Pair Should You Choose?

Forever Sourcing lists several ASICS silhouettes with different uppers and shapes. The following guidance is intended to help you choose what to check, not to invent a universal half-size rule for each model.

ASICS GEL-1130 Sizing

The GEL-1130 is a retro running-inspired trainer with a layered mesh-and-synthetic upper. If your usual UK ASICS size fits comfortably, start there. Pay particular attention to the forefoot and toe shape: shoppers with wide feet may prefer trying the pair before purchase rather than ordering larger solely for extra width.

Explore the ASICS GEL-1130 collection to compare colours and the UK sizes shown on individual listings.

ASICS GEL-KAYANO 14 Sizing

The GEL-KAYANO 14 has a detailed technical upper and a more structured, substantial silhouette. The retailer’s GEL-KAYANO 14 Slate Grey product listing describes the model as generally true to size, recommending your usual UK trainer size unless you prefer extra room. Treat this as model-specific retailer guidance, not a guarantee for every foot.

Browse GEL-KAYANO 14 trainers or check the Slate Grey product listing for a concrete example of sizing advice.

ASICS GEL-NYC Sizing

The GEL-NYC combines archive-inspired running elements with a lifestyle construction. As with any layered retro trainer, take note of your foot width, sock thickness and how firmly you lace the upper. Rather than assuming it fits exactly like your GEL-1130 or GEL-KAYANO 14, check the particular style’s size selector and product information.

For an example, see the GEL-NYC Cream Mineral Beige product listing.

ASICS GEL-VENTURE 6 Sizing

The GEL-VENTURE 6 has a trail-inspired design and a different outsole profile from ASICS’ retro lifestyle models. If you intend to wear thicker socks or spend longer outdoors, test the combination you actually plan to use. The GTX version should be considered separately from the standard version, as materials and upper construction can affect how a shoe feels.

See the available ASICS styles at Forever Sourcing and read the product description for the exact GEL-VENTURE 6 version you want.

ASICS Sizing Compared with Nike and Saucony

Do not treat UK 8 in one brand as a guaranteed identical fit in another. Size conversion charts and shoe shapes can differ. An ASICS GEL-1130, Nike P-6000 and Saucony ProGrid Omni 9 may all display the same UK size but feel different at the toe box, heel and midfoot. Use the actual label and model guidance before switching brands.

Compare other retro runners in our Saucony trainers and Nike P-6000 collections, or read the complete ASICS trainer guide for an overview of ASICS models.

Common ASICS Sizing Mistakes to Avoid

Using the wrong gender chart

A men’s/unisex conversion table should not be substituted for a women’s-specific product chart.

Assuming a half size always solves a width problem

Too much length can create heel movement while leaving the midfoot uncomfortable.

Ignoring the exact variant

Size options can differ by colourway, product version and stock.

Ordering purely from EU conversions

Read the ASICS-labelled UK, EU and CM values rather than using a generic internet conversion formula.

Forgetting return conditions

Check the store’s current shipping and returns policies before purchasing.

Where to Buy ASICS Trainers in the UK

Forever Sourcing stocks a selection of ASICS GEL-1130, GEL-KAYANO 14, GEL-NYC and GEL-VENTURE 6 styles. Product listings show selectable UK sizes where available, although stock and prices change. The website advertises authenticity checks before dispatch, free UK shipping on orders over £75, and flexible payments. Check the current policies for the full terms.

Start with the ASICS collection, browse the GEL-1130 versus GEL-KAYANO 14 buyer’s guide if you are comparing models, and review the shipping and returns information before checkout.

ASICS Sizing UK: Frequently Asked Questions

Do ASICS trainers run small?

Not all ASICS trainers run small. Start with the correct ASICS size chart and assess each model independently. A particular fit may feel snug because of its shape or width rather than because the size label is inaccurate.

Should I size up in ASICS GEL-KAYANO 14?

Forever Sourcing’s Slate Grey listing describes GEL-KAYANO 14 as generally true to size. Start with your regular UK trainer size unless your feet or fit preferences suggest otherwise.

Is ASICS UK sizing the same as Nike?

Not necessarily. Even when UK size numbers match, each brand uses its own lasts and model constructions. Compare the brands’ own charts and the fit of a pair you already own.

What if I am between two ASICS sizes?

Measure both feet, consider sock thickness and intended use, and consult the exact model listing. If uncertain, ask the retailer before purchasing.

Are ASICS GEL-1130 and GEL-NYC sized the same?

Do not assume they are identical. They use different constructions, and a comfortable size in one is a starting point, not a guarantee for the other.

How can I check which ASICS sizes Forever Sourcing has?

Open the relevant product page and select your size. If your size is unavailable, check the retailer’s sourcing or contact options.

Final Advice: Choose Fit First, Then Colourway

A good ASICS sizing decision combines three checks: your measured feet, the correct ASICS size chart and the specific model you want. Once you know the UK size likely to suit you, narrow the Forever Sourcing collection by size, compare GEL-1130, GEL-KAYANO 14, GEL-NYC and GEL-VENTURE 6, and confirm the chosen variant before checkout.

Browse ASICS trainers in the UK to explore the latest listed styles and size options.