Regular window size 4width X 4 height floor to window sill 3' kitchen window size 4 width X 3 height floor to window sill 4' if low sill means stove burner of due to air

Vinotha, iIts a personal preference. If your family is used to.a circular one go for it. I find eating on a rectangular one more comfortable gives me elbow space. IMHO , a rectangular one suits the layout but not overriding what your designer have in mind. Thanks, Nitin Cornerstone Designs, Bangalore

Hi Shivam, I hope you are doing good. There is no particular tile size that may look good as it completely depend kind of design you have in your perspective. If you are looking at more traditional interiors then generally smaller tiles with motifs or emblems look good which have a representative geometrical or floral patterns. If you are looking at more modern interiors then generally bigger tile sizes are preferred for clean look less joints.  Regards, deSigneR

8'x10' would be good to go!