PAL

Ptolemaeus Arabus et Latinus

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% (the percent sign) is the placeholder for no, one or more than one character.
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At the beginning and at the end, these placeholders are superfluous.

σύμμετρος τῷ μεγέθει ‘of a suitable size’

Greek

References: Alm. Heiberg: I.12, 64:12-13
Translated into:
Arabic: معتدّل في مقدار [Alm. MS Tunis: ]
Arabic: مقتدر العِظَم [Alm. MS Leiden: f. 10v]
Modern translations:
English: of a suitable size [Alm. Toomer: 61]