To use this chemise, simply put it on like you would any other piece of lingerie. It's great for a romantic night or just to feel comfortable. When it comes to care, always use a delicate, cold wash to keep the lace and jersey in good condition. Don't use harsh detergents or bleach. As for sizing, make sure to refer to the Fit Guide to get the perfect fit. Avoid pulling or tugging on the lace too hard to prevent damage.