What Size Climbing Shoes Should I Buy?

If you've ever tried on a climbing shoe in your normal street size, you'll know the answer straight away — normal sizing logic doesn't apply here. Climbing shoes are built to sit close to the foot so you get direct feedback from footholds, and the correct size depends on more than just the number on the label. It depends on the brand, the shoe's shape, and — most of all — how experienced you are as a climber.

We stock Black Diamond, La Sportiva and Scarpa climbing shoes in-store in Dublin and online, and this is the sizing advice we give customers at the counter every week.

The general rule: fit changes as you improve

Every brand sizes slightly differently, but the pattern that matters most is this: the more advanced you are, the smaller and tighter your shoes should go. Beginners need comfort and support to build technique. Experienced climbers trade comfort for precision, because a tighter shoe transmits more feeling through to the rock or the wall.

As a rough guide, most climbers end up somewhere between half a size smaller (beginners) and up to two sizes smaller than their everyday street shoe size (advanced/pro), with the exact deviation depending on the brand, the model's last, and whether you're bouldering, sport climbing, or on longer alpine routes. Bouldering shoes are typically sized the tightest of the three disciplines, since short, powerful movement rewards a snug, curled-toe fit. Alpine and multi-pitch shoes are sized roomier, since you may be standing in them for hours.

Sizing by experience level

Beginner climbers

If you're new to climbing, size for comfort first. A shoe that's painful after twenty minutes will put you off climbing before you've had a chance to improve. Aim for a snug fit with your toes reaching the end of the shoe without being aggressively curled — typically half a size to a full size down from your everyday street shoe size.

• Black Diamond: Black Diamond's climbing shoe fit runs close to Five Ten, so if you've worn either brand before, use that as your reference point. Their beginner-friendly models are built with flatter lasts and more room in the toe box, which suits a first pair well.
• La Sportiva: La Sportiva tends to size noticeably smaller than most other brands, so don't assume your usual size will work here — always try before you commit, or check our size guide notes on the product page.
• Scarpa: Scarpa runs closer to true-to-size than La Sportiva, with a reputation for a slightly roomier fit, so many beginners find Scarpa the more forgiving starting point.

Intermediate climbers

Once you're climbing regularly and starting to work on technique, a slightly tighter fit than your beginner shoe helps with precision on smaller footholds, without sacrificing so much comfort that you dread putting them on. Intermediate climbers typically size around one size down from street shoe size, adjusting slightly by discipline — a touch tighter for bouldering, a touch roomier for longer routes.

• Black Diamond: Their mid-tier models add more structured heel tensioning at this stage, useful once you're starting to use heel hooks.
• La Sportiva: Because La Sportiva already runs small, going a further size down from your beginner pair is often unnecessary — many climbers only need to drop half a size as they progress.
• Scarpa: Scarpa's intermediate shoes usually introduce more aggressive downturn, so expect the fit to feel noticeably snugger than their beginner range even at the same size.

Advanced / experienced climbers

Experienced and performance-focused climbers prioritise sensitivity and power transfer over comfort, sizing down as far as they can tolerate — often up to two sizes smaller than street shoe size for aggressive, downturned models. This is where individual foot shape matters most, since a shoe that's too tight in the wrong place causes real problems, not just discomfort.

• Black Diamond: Their performance shoes hold the same closer-to-Five-Ten fit as their beginner range, just with far less spare volume, so the sizing logic carries through — expect a much tighter overall feel at the same relative size drop.
• La Sportiva: As the brand that traditionally runs smallest, advanced La Sportiva sizing can mean going a full size and a half to two sizes below street size on their most aggressive, downturned models.
• Scarpa: Even at the performance end, Scarpa keeps a comparatively true-to-size, narrow-heeled fit, which is why plenty of advanced climbers who find other brands too aggressive settle on Scarpa instead.

Things that affect sizing beyond experience level

• Leather vs synthetic: Leather uppers stretch and mould to your foot over time — sometimes by half a size or more — so a snug fit on day one is expected. Synthetic uppers hold their shape and barely stretch, so they need to fit close to correct from the first wear.
• Foot shape: If your second toe is longer than your big toe (a "Greek" foot shape), you may find certain brands' toe boxes more comfortable than others regardless of what the general brand guidance says. Trying shoes on in-store remains the most reliable way to check.
• Socks or no socks: Most climbers go sock-less for maximum sensitivity. If you prefer wearing thin socks, size up slightly to compensate.
• Discipline: Bouldering rewards the tightest, most curled-toe fit for power. Sport climbing sits in the middle. Longer alpine or multi-pitch routes need more room, since you'll be on your feet for hours at a time.

Buying vs breaking in

New climbing shoes almost always feel tighter on day one than they will after a few sessions. This is completely normal, particularly with leather uppers, and is exactly why sizing down feels uncomfortable in the shop but works once the shoe has broken in. That said, tight enough to curl your toes on purpose is very different from genuinely painful — if you're in real pain standing still, the shoe is too small, not "not broken in yet."

Warmer conditions can also make feet swell slightly, so shoes that fit fine in winter can feel tighter come summer.

Our advice: try before you buy

Sizing charts and general rules get you close, but climbing shoes are personal enough that the best way to get it right is trying them on. Pop into our Dublin store and our team will fit you properly across our Black Diamond, La Sportiva and Scarpa range, whatever stage of your climbing journey you're at. Prefer to shop online first? Browse our full climbing shoe range to compare models before you decide.

FAQ

Do climbing shoes run smaller than normal shoes? Yes. Climbing shoes are designed to fit tight and close to the foot for better feel on the rock, so most climbers size down from their everyday street shoe size — the exact amount depends on the brand and your experience level.

Should beginners size down a lot? No. Beginners should prioritise comfort, typically sizing only half a size to one full size smaller than their street shoe, regardless of climbing discipline. Aggressive downsizing is for advanced climbers chasing maximum performance, not newcomers.

Do La Sportiva, Scarpa and Black Diamond fit the same? No. La Sportiva tends to run smallest and narrowest, Scarpa runs closer to true-to-size with a reputation for extra room, and Black Diamond's fit is often compared to Five Ten. Always check sizing by brand rather than assuming your usual size carries across.

Will my climbing shoes stretch over time? Leather uppers can stretch and mould to your foot, sometimes by half a size or more, so a snug fit when new is expected. Synthetic uppers hold their shape much more and shouldn't be bought expecting significant stretch.

Can I get fitted for climbing shoes in-store? Yes. Our Dublin store stocks Black Diamond, La Sportiva and Scarpa climbing shoes, and our team can help you find the right fit in person for your experience level and climbing discipline.