As someone who owns an i20, I could tell you that the Maruti S-cross is 315mm longer, 51mm wider and 90mm higher than an i20.
Basically the Maruti Suzuki S-Cross dimensions are 4,300 mm long, 1,785 mm wide and1,595 mm high whereas the Hyundai i20 is 3985 mm in length, 1734 mm in width and 1505 mm in height.