Note the dimensions below. The coolness and weight of rose quartz helps relieve sinus discomfort, and reduces the look of puffiness and fine lines. How to use: After using your serum of choice and/or crystal roller, lay the cool mask over eyes while feeling tension dissolve. Leave on as long as you wish. Turn the mask upside down and lay over the mouth and jaw area to soothe lines and tension around these pent up areas. Approx Size: 21cm x 20cm How to care for your Quartz Mask: These are delicate, always handle with care. Gently blot dry with a soft cloth or hand rinse with water and gentle soap