CAÑONAZO 

Popular Name: Siglo VI 
Dimensions: 5 7/8 ins x 52 ring gauge, or 150 mm x 20.64 mm diameter. 
Many consider this to be the ultímate shape and size for a Habano. Today it is acknowledged for its excellent combustion that releases the full flavour of its filler blend during the hour or so it takes to smoke. This size was chosen for the first Gran Reserva Habano.