What is the best exercise for bigger legs?

The best exercise for bigger legs is the squat. Squats target the quadriceps, hamstrings, and glutes, which are the three main muscle groups in the legs. Squats can be done with a barbell, dumbbells, or bodyweight, and can be modified to suit any fitness level. Squats are an effective exercise for building strength and size in the legs, and can be incorporated into any leg workout routine.