规格
guīgé · HSK 7
standard
📏 规格 = 规 rule + 格 standard-pattern, so the agreed specification
规 means rule or regulation; 格 means a fixed pattern or grid square. Together they name the rule-pattern a product must meet: its specification or standard. Sound start gui-ge echoes guide-grade, the grade a thing is guided to meet.
格 — wood 木 + 各 (each, phonetic)
格 is a semantic-phonetic compound: 木 (wood) gives the meaning, originally referring to a wooden frame, lattice, or crossbar, while 各 supplies the sound. From 'frame/grid' the meaning extended to 'pattern, standard, style' and the modern senses of 'square (in a grid)' and 'character/disposition'.