We carry two different styles of table legs. Both sets of legs are intended to the right height to make a 30 inch table. The legs assume your table top is about 1.25 inches thick. Both sets of legs have a plate at the top that is welded that gets attached to the underside of the vintage table with screws. You can set the legs where you like. It is a little hard to put the legs on so you may want a handy man to help with your replacement table legs.