The umbilicus is about one third the width of the shell.

The width of the shell is 15 - 20 mm.

The width of the shell is from 7.5 mm to 9.5.

The width of the shell is up to 8 mm.

The width of the shell is 19.9 - 22.7 mm.

The width of the shell is about 12 to 16 mm with 5 whorls.

The average width of the shell is 25 mm.

It takes 7 years to grow to the size where the width of the shell is 54 mm.

The width of the shell is from 10 to 10.5 mm.

The width of the shell can reach up to 10 mm.