斤斤较量

to bicker at length over a trivial matter (idiom)

catty / (PRC) weight equal to 500 g / (Tw) weight equal to 600 g / (HK, Malaysia, Singapore) slightly over 604 g

to compare / to dispute / compared to / (before adj.) relatively / comparatively / rather / also pr. [jiao3]

to pit oneself against sb / to compete with sb / contest / battle / to haggle / to quibble

to measure

capacity / quantity / amount / to estimate / abbr. for 量詞|量词[liang4 ci2], classifier (in Chinese grammar) / measure word