By Charles 
The standard seat depth for a dining chair is usually about 16 to 18 inches, measured from the front edge of the seat to the backrest. This range supports most adults while leaving enough room behind the knees for comfortable sitting.
Seat depth affects posture more than many people realize. If the seat is too shallow, taller users may feel unsupported through the thighs. If it is too deep, shorter users may have to slide forward or press the back of their knees into the seat edge. The best chair lets you sit back against the backrest while keeping a small gap between the seat front and your knees.
Upholstery changes the feel. A padded chair may compress slightly, while a hard wood or molded seat feels more exact. Curved seats can also feel deeper or shallower than the measurement suggests. If the chair has arms, make sure the arms fit under the table or still leave enough space to sit comfortably.
Seat height should be checked with depth. Most dining chairs pair with standard dining tables when the seat height is around 18 inches, but table apron thickness and cushion height can change knee clearance.
For POVISON, browse Dining Chairs and compare seat depth, seat height, back shape, and upholstery before choosing a full set.
