This is a Fire King "Extra Heavy Cup & Saucer, Jade." It's a heat-resistant milk glass product manufactured by the American Anchor Hocking company from the 1940s to the 1960s. The name "Jade" comes from its color, which resembles jadeite, a stone believed to bring good luck. It was mainly made for commercial use in restaurants and diners, so it's thick and durable. Vintage items are no longer in production and are popular collector's items worldwide. Size: Cup Width approx. 12cm, Diameter approx. 10cm, Height approx. 6.5cm Saucer Diameter approx. 15.5cm ⭐️ Cup has a chipped rim. Thank you for viewing.