Kalmar "sq in" gajarta ce da aka saba amfani da ita don "square inch," wanda shine raka'a na ma'aunin yanki a cikin tsarin aunawa na Ingilishi. Inci murabba'i ɗaya yana daidai da yankin murabba'i tare da ɓangarorin da kowannensu tsayinsa inci ɗaya ne. Ana amfani da gajeriyar "sq in" sau da yawa a cikin zane-zane na fasaha, ƙayyadaddun aikin injiniya, da sauran mahallin inda ma'aunin yanki ke da mahimmanci.