The height of the nacreous shell attains 2 mm.

The faster the change in the muscular contractions, the greater is the power created and the resulting height attained.

The height of the small shell attains 6 mm.

The height of the small, conic shell attains 3.5 mm.

The height of the globose-depressed shell attains 7 mm.

The height of the whitish to dirty buff shell attains 8.5 mm.

The height of this yellow shell attains 2.3 mm.

The height of the gray to grayish white shell attains 20 mm.

The height can attain four meters, but more commonly averages two to three meters in the wild.

The height of the shell attains 4 mm.