The size of a cephalopod shall be measured along the dorsal mid-line from the posterior tip of the mantle to the anterior border of the mantle, for squid and cuttlefish, and to the level of the eyes for octopuses.
Velikost glavonožcev se meri vzdolž hrbtne središčne črte od zadnje konice plašča do sprednjega roba plašča za lignje in sipe oziroma do ravnine oči za hobotnice.