Tired of your size being
out of stock everywhere?
Only see shoes in stock from the UK's top running retailers.
Not sure what shoe to get? Find your perfect match →
.svg.png)
How RunSizer works
Stop visiting six websites to find your size. We check stock and prices across the UK's top running retailers in one place.
Search for your shoe
Search by model name or browse by brand across Nike, Hoka, Asics, Brooks, New Balance, Saucony and more.
Pick your size
Select your UK size and we instantly filter results to only show retailers who have it in stock right now.
Buy at the best price
Prices are sorted lowest first. Click through to buy directly on the retailer's site. We never touch your payment.
Popular right now
The most searched shoes on RunSizer this week
Not sure where to start?
Answer 4 quick questions about how you run and we'll recommend the perfect shoes for you — matched to your distance, goals, and budget.
Takes 2 minutes
Guides
Expert advice on finding the right running shoe
Best Running Shoes for Marathons
Whether you're chasing a PB or just want to get round comfortably, here are the best marathon shoes available in the UK right now.
Read guide →
Best Running Shoes for a Sub-4 Hour Marathon
Targeting sub-4? The right shoe can shave serious time. Here's what to wear if you're chasing that four-hour barrier.
Read guide →
Best Running Shoes for a Half Marathon
The half marathon is the perfect distance for most runners. Here are the best shoes to wear for 21km, whether you're racing or just getting round.
Read guide →
Best Running Shoes for Beginners
Just starting out? Here's everything you need to know about picking your first proper pair of running shoes and the best options available in the UK.
Read guide →
Best Carbon Plate Running Shoes
Carbon plate shoes have transformed distance running. Here's a breakdown of the best options and whether they're right for you.
Read guide →
When Should You Buy Carbon Plate Running Shoes?
Carbon plate shoes are expensive and not right for every runner. Here's exactly who should buy them, when, and which ones to go for.
Read guide →
Best Running Shoes for a 10K
10km is fast enough to need a performance shoe but short enough to prioritise speed. Here are the best options for race day and training.
Read guide →
Best Running Shoes for a 5K
5km is short, fast, and demands a lot from your shoes. Here are the best options for parkrun, track 5Ks, and race day.
Read guide →
Best Running Shoes for Women in the UK (2026)
The best women's running shoes available right now — from plush daily trainers to race-day carbon plate supershoes.
Read guide →
Best Women's Running Shoes for a Marathon
From carbon plate supershoes to plush endurance trainers — the best women's marathon shoes you can buy in the UK right now.
Read guide →
How to Find Your Running Shoe Size — The Complete UK Guide
Running shoe sizing is not the same as your normal shoe size. Here's exactly how to measure your feet and find the right fit for your running shoes.
Read guide →
Neutral vs Stability Running Shoes — Which Do You Need?
Neutral or stability? It's the first question most running shops ask. Here's what the difference actually means and how to figure out which is right for you.
Read guide →