http://www.sewingmates.com/surround-.../#.UaXzS0DCOSo
Check out this site for the insert. I love mine. It has made sewing so much easier. There are several threads on here about converting tables and also Eleanor Burns has a tutorial on converting a farm table to a sewing table. I hope this helps. Ps. Bonnie Hunter of Quiltville recommends the sewing mates extension tables and insert. Happy sewing.