The general model of 1:18 model is basically above 20cm. The height of the physical model is determined by the height of the real car. The proportion of car mold refers to the proportion multiple of car mold manufacturers strict according to the real car specifications, a wide range of 1:10, 1:12, 1:18, 1:24, 1:43, 1:64, 1:18=25 cm, 1:24=18 cm, 1:43=10cm, 1:64=7 cm, Other models can find the length of the real car and divide it by 18 to get the numerical model length and so on