Prioritize a secure, close fit without painful compression, then choose shoe shape for the climbing you do. Sizing varies by brand, model and foot shape, so measure and use that maker's chart. La Sportiva says its unlined slip-lasted models can stretch about one full size; that estimate does not apply to every shoe.
Fit is model-specific. A shoe should stay secure on the heel and toe without relying on painful compression.
Match shape to your climbing
| Shape | Typical feel | Common use |
|---|---|---|
| Flat or neutral | Less downturn | Gym sessions, beginner practice, cracks and longer routes |
| Moderate | Slight downturn | A balance for varied sport and gym climbing |
| Aggressive | Stronger downturn and asymmetry | Steep routes and bouldering where toe position matters |
These are broad design patterns. Each model’s last and sizing determine how it fits your foot.
Measure and try the exact model
Use the manufacturer’s size chart and fitting instructions. The UIAA recommends accurate measurements and brand-specific size charts because sizing can vary between makers. Check the heel, toe box and widest part of the forefoot; the shoe should not rely on painful pressure to stay on.
Materials and stretch
Upper material and lining change how a shoe may adapt with use. La Sportiva’s sizing guidance says unlined slip-lasted models may stretch about one full size. Treat that as guidance for those constructions, not a universal rule. Follow the maker’s fit recommendation before choosing a smaller size.
Shape and closure are different choices
Shape changes how the shoe positions your toes. Laces, hook-and-loop straps and slip-on constructions change how a model closes and adjusts. Compare them in our climbing shoe closure guide.
For bouldering, also plan the landing area with our crash pad size and coverage guide. Browse climbing shoes.
Common questions
How tight should climbing shoes fit?
They should stay secure through the heel and toe without painful compression. Follow the exact model's size guidance because shape and sizing vary by maker.
Do climbing shoes stretch?
La Sportiva says its unlined slip-lasted models can stretch about one full size. Lined, synthetic and other brand constructions differ, so check the exact shoe.
What shape should a beginner choose?
Flat or moderately downturned shoes are common all-round choices. Match the shape to your foot and climbing, then confirm the fit in the model's size chart.
Should I size climbing shoes below my street size?
There is no universal conversion. Use the manufacturer's guide for the exact model and measure your feet as directed.