Set includes 3 different sizes: 17 cm, 20 cm, and 23 cm, Duralex,shock resistant tempered glass, is 2.5 times more resistant to breakage and chipping than normal glass, Can also withstand sudden thermal shock, from -4 F to 212 F Duralex glass is very hygienic. It is non-porous and does not absorb liquids, colors or flavors Dishwasher, refrigerator and microwave safe. Products maintain the original look for years. Made in France. Duralex glass products are tempered. The mechanical and thermal resisting properties are considerably increased compared to other ordinary glassware products. Lys Square Bowls by Duralex are the perfect weight, functional yet stylish and feels extremely comfortable in the hand. Because they are equally suitable for cold and hot food, they can go straight from the refrigerator to the microwave. They are conveniently stackable, impact and chip resistant, microwave and dishwasher safe. With the help of continuous investments and commitment to quality, Duralex has reached a level of excellence that makes its products recognized throughout the world. Duralex is and will always remain a true French manufacturer of glassware and tabletop products, and is the only manufacturer who makes 100 percent of their products in France.