Size: fits both standard, queen-sized and king pillows. Seamless finish with an envelope style opening that protects your pillow inside. HAIR BENEFITS: - less tangles and frizz, wake up to your hair no longer having that "bed-head" look and be able to continue your day without any use of heat! Second, third, & fourth-day hair just got so much easier 😍 SKIN BENEFITS: - anti-bacterial and doesn't soak up your moisturizer and serums like typical pillowcases do - acne-fighting by offering a healthier and cleaner sleeping environment - anti-aging and wrinkle preventing by reducing friction which can cause pulling and tugging on delicate skin Washing Instructions (you can put this silk item in the washing machine, heck ya!): *put the pillowcase in the washing machine by itself and not with any other clothes or garments - buttons, zippers, etc. can cause snags if it catches onto the silk. 1. Turn the pillowcase inside out and place it in either a delicate garment bag or an old pillowcase before you put it in the washing machine for longevity. 2. Use the delicate/gentle setting if your washing machine has one and if not, set it to cold temperature. 3. Preferably use a gentle washing detergent and no fabric softener. You can also buy a laundry detergent that is specific for silk to keep it's shine! 4. Hang to dry or put it dryer on gentle.