This is to be looked at comprehensively, the seat area of the general seat is about 50cm*50cm, but also to reserve at least 20cm of activity space, that is, at least 60cm on all sides, the maximum size is 0.8m*3.8m, and the normal has to leave about 1m of the passage, that is, the maximum is about 0.8m*2.8m. Buy a width of 0.8~1m length of 2~2.5m table is almost.