Heightened insoles are usually 2-3 cm each, so they can't be too high. If they are higher, you won't be able to stand unsteadily. Well, I think two centimeters and two centimeters are enough for ordinary people. If they are too high, it will definitely affect people's heels and even forefoot. Well, heightening insoles is mainly about buying that insole back, then taking all the other insoles in the shoes, well, and then putting that heightening insole pad.