Terms for subject General containing light as a feather

English	Russian
as light as a feather	лёгкий как пёрышко
as light as a feather	лёгкий как пух (as air)
light as a feather	лёгкий как пушинка
as light as a feather	невесомый
she is light as a feather	она лёгкая как пёрышко