3" X 8 1/2" chimney with 4" bulge. This is the usual size chimney for Lamplighter Farms and other flat wick lamps which require a 3'' base chimney. The 4'' bulge WILL NOT FIT through the bottom of a ball shade.
3" base for lamps such as Lamp-lighter Farms and #2 Queen Anne burners (Limit two chimneys per order/per package.)
