This tray mould holds approximately 2.6kg (6.5 pounds) of soap.
The size of the soap block before cutting into 18 individual bars is 40cm x 20cm x 3.5cm (16" x 8" x 1.5").

1 large cavity that makes 18 identical soaps after cutting.
The 18 individual soaps weigh approx. 140g (5 ounces)
The 18 individual soaps size is approx. 7cm x 7cm x 3.5cm (2.75" x 2.75" x 1.5").

Due to the large volume of soap produced with these moulds, cp soap will generate more heat than it does in the regular size moulds. You should control your gel phase as a very hot gel phase may cause the moulds to warp.