I think you need at least 10" to seat comfortably. Ten to twelve is what I remember but that might not be accurate. Nevertheless, at 18" you'd only have 6 inches.

What is the height of your current chairs? You can probably find some low vintage ones on CL.

This post was edited by snookums2 on Sun, Apr 14, 13 at 13:15

Could you add some blocking to the table, between the legs and the top, to give it some additional height? Since the table has an apron already, it might hide the additional blocking.

We had a desk/table that was a little too low for leg room and added the largest (reasonable) caster we could find. It worked well and also allows us to move the table with ease over a bumpy floor.

20" does sound high for a dining chair. My husband and I are average to slightly tall, and our chair seats are 18", Any higher would be uncomfortable.

Twenty inch seat height is awfully high for a chair. That would actually leave some people's legs dangling. 17-18 is usual.

Thanks to you all. Yes, it seems a little high to me, too. I measured our current ones and, surprise, they're over 19" to the top of the cushion. The upholstered seat goes down a little when you sit on it. The table is low, though. I think it would be good to raise it up an inch in any case, as jakabedy suggests.

Thanks for weighing in.