Material:Food Grade Silicone;Outer Circle Dia:3.8cm(1.5");Inner Dia:2.4cm(1");Molds Size:29cm x 26cm(11" L x 10"W);Color:it is Random color if no special note;Oven safe to -65F to +400F (-40c to +230c);Flexible and non-stick silicone， China;Dishwasher-， refrigerator-， freezer- and microwave-safe.