Joan I have both sizes I find myself using the small one 99% of the time as I only light 14 or so briquettes then dump them over my charcoal baskets that have charcoal in them or in my smoker basket. Charcoal lasts longer since it does not burn so fast compared to if you used the large chimney and filled it then lit it up.DH is on his laptop looking for chimneys. If we need one, any suggestions, PLEASE!!!!!?