Dimension for 28 compartments:

Length X Breadth X Height: 35cm x 22cm x 4.8cm.

Individual compartments: 4.8cm x 5cm. 

Dimension for 15 compartments:

Length X Breadth X Height: 17.5cm x 10cm x 1.9cm.

Individual compartments: 1.8cm x 1.8cm.