There is no direct correspondence between the volume of microwave oven cavity and the number of household users. For ordinary families, it can be selected in the range of 20 ~ 30L, and the best cavity volume is about 23L. Users consider household microwave ovens mainly according to their living habits, diet structure, dependence on microwave ovens, housing conditions and economic affordability, and can properly consider microwave ovens when decorating; Friends who choose the embedded microwave oven should pay special attention to the size of the microwave oven, otherwise it is inevitable that the microwave oven will not be suitable during the decoration process, leading to unnecessary trouble. For home use, it is enough to buy a capacity of 20L, which is very beautiful. For example, the model is EM720KG 1-PW, and the overall dimensions of this model are 461mm * 361mm * 289mm.