The body chamber is one half the overall shell length.

The green abalone's shell length can reach a maximum of 20 cm.

Black foot paua grow to about 180 mm in shell length.

The average shell length of this species is about 12.5 cm.

Individuals usually reach sexual maturity at shell lengths of 32-34 mm.

The maximum recorded adult shell length for this species is 31 mm.

No ormers may be taken from the beach that are under 80 mm in shell length.

This species remains relatively small, with a shell length of 12-15 cm.

The maximum reported shell length for this species is 114 mm.

They vary in pitch by using different shell lengths, rather than widths.