Furniture is important to us, and there is furniture here and there in our daily life. But we may not know what kind of furniture is a better choice.

Chairs are necessities in our daily life, and when we buy them, we should pick the chairs with a proper height. We should know the length of our shank, then choose the chairs whose height should be less than the length of our shank about 1 centimeter. When we sit on chairs with such height, it will be quite convenient for us to move legs forth and back.
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