How should indoor cycling shoes fit compared to regular shoes?

Indoor shoes should fit snugly with no heel lift when you stand on the pedals, but with enough room in the toe box that your toes aren't cramped. Expect your feet to swell slightly during class due to heat and sustained effort, so don't size down too aggressively. You should be able to wiggle your toes slightly. If you feel numbness or pressure points within the first 10 minutes, the shoe is too tight or the wrong shape for your foot. When in doubt, prioritize width over length.