Package of 6 fish tanks. Each glass fish tank comes with their own lid. The tanks range from 4L up to 35L. And the sizes of these tanks are size 6-11 The sizes of each individual tank are: 25cm x 12cm x 15cm (4L) 30cm x 15cm x 18cm (7L) 35cm x 18cm x 20cm (11L) 40cm x 20cm x 24cm (16L) 46cm x 23cm x 27cm (25L) 52cm x 25.5cm x 30cm (35L) Each tank is sold separately, as well as in the package. Suitable for fish or can also be used for some invertebrates.