Buy an iron or aluminum alloy household ladder, which is better, a four-step ladder or a five-step ladder? Is it true that the ladder of Feng Shui is singular?

Generally, aluminum alloy ladders are used. Now, in order to reduce costs, manufacturers make aluminum alloy walls thinner, and the price is cheaper. The steps of ladders are determined according to the total height. Aluminum alloy ladders on the market are only suitable for men to walk. If women want to use them, it is best to choose the ones with small steps (short steps).