Your table and chairs don’t have to match. Your chairs do need to suit your table’s scale and style.
If you measure from the top of the table to the floor, most dining tables range from 28 to 31 inches high; a 30-inch height is the most common. From the top of the seat to the floor, dining chairs frequently range from 17 to 20 inches high. That means the distance between the seat and tabletop could be anywhere from 8 to 14 inches.
Scale isn’t just about compatible heights. You also need chairs that actually fit under your table. If they don’t, your diners won’t feel comfortable and you’ll damage both table and chairs.