PAL

Ptolemaeus Arabus et Latinus

_ (the underscore) is the placeholder for exactly one character.
% (the percent sign) is the placeholder for no, one or more than one character.
%% (two percent signs) is the placeholder for no, one or more than one character, but not for blank space (so that a search ends at word boundaries).

At the beginning and at the end, these placeholders are superfluous.

size ‘size’

English

References: Alm. Toomer: 36; 38
Translation of:
Greek: μέγεθος [Alm. Heiberg: I.2, 9:22]
Greek: πηλικότης [Alm. Heiberg: I.1, 6:2; I.10, 43:4, 47:1; I.10, 47:4,6,12]
Synonyms:
size / amount[Alm. Toomer: 48; 54; 56]