Dining Chair Buying Guide -
You need 25–30 cm (10–12") of space between the top of the chair seat and the underside of the table for legroom.
Your lifestyle—especially if you have kids or pets—should dictate your material choice. Dining Chair Buying Guide: Seat Height, Width & Materials dining chair buying guide
For a standard 75 cm (30") table, aim for a seat height of 45–48 cm (18–19") . You need 25–30 cm (10–12") of space between