I made the top circle 60 inches diameter and extruded by about .5 inches. For the legs I made a sketch half way through the circle and drew reference like triangular shapes with rounded edges. I that extruded that by 2 inches mid way and repeated that on the perpendicular plane.For the Dinning chai i made the legs 18 inches high and the seat 21 inches deep. I made the seat cushion and than started making the back. I made the back legs 34.5 inches high to also accommodate for the back, and for the cushion i just made a sketch on the top using an arc and offset which after extruding i filleted.in the front i also added a support feature bar between the legs and a support system for the cushion of two ba at and angle.