尺子的英文是ruler。

解释： ruler 英[ˈru:lə(r)] 美[ˈrulɚ] n. 统治者; 尺; 直尺; [例句]The ruler cracked and splintered into pieces 尺子裂开了，碎成了小片。His guitar makes a noise like a wooden ruler being twanged upon a desk 他的吉他发出一声仿佛木尺弹在课桌上的噪音。There is a pen, a knife and a ruler in the box. 盒子里有一支钢笔，一把小刀和一把尺子。This is a ruler graduated in both inches and centimetres. 这是一把刻有英寸和公分的尺子。