Just to add to the confusion, climbing shoes change shape and stretch as you break them in, so they'll be floppier after a few weeks of wear (especially leather). Your feet also fluctuate in size from hour to hour and one of them may well be bigger than the other.

How much do climbing shoes stretch?

The most they will stretch is a half size due to the rubber molding around your foot during use. How Long Does It Take For Climbing Shoes to Break In? It usually takes 2-3 weeks to break in a pair of climbing shoes if you are climbing consistently. This means about 8-10 climbing sessions.

How do I know if my climbing shoes are too tight?

Generally, for sport/bouldering/gym shoes, look for a fit where all your toes are touching the front and are slightly curled in your shoes. You need to be able to press with all parts of the foot, not just the big toe. The key is you want it to be snug, not painfully tight.