These are unconditional, petticoat-style pants. I remember being told to wear them freely, like showing them off under a dress, or wearing them on their own. However, I'm not sure of the details... I hope you can wear these thin pants, which are like harem pants, fashionably. Size S, but the waist is quite large as it ties with a string. Waist, laid flat approximately 37cm, tied with a string Length approximately 63cm