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Clay Chimney Pot Sizing Guide - How to Pick the Correct Size Clay Pot

July 19, 2023

This chart displays guidelines based on typical dimensions of flue liners. There is no guarantee that the information is accurate and that the item will definitely fit the flue size listed. All flue liner sizes listed are NOMINAL dimensions and do not accurately represent the true measurements of a flue liner. Flue dimensions will vary depending upon manufacturer and age of flue liner. Be sure to accurately measure the flue liner before ordering a chimney pot to insure that the pot will fit properly.

Please note that the chimney pot base should not impinge upon the inside surface of the flue liner. One exception to this is that round based pots may impinge at the corners of a square flue but not by more than 3/4 in.

Square flue liners are nominally sized using OUTSIDE dimensions. Round flue liners are nominally sized using the INSIDE dimensions.

Warning! Do not use decorative chimney tops on any pre-engineered or prefabricated fireplace/chimney system (sometimes referred to as zero-clearance fireplaces) without written consent from the manufacturer. Improper installation of these products in conjunction with these various metal flue systems could result in fire and/or carbon monoxide buildup resulting in property damage and/or death.

† Chimney pot should fit over the flue liner and cement directly to the cap without contacting the flue.
• Chimney pot should fit flue provided the flue is cut flush with the cap.

  Square or Rectangular Flues
(dimensions in inches)		 Round Flues
(diameter in inches)
Item Base Shape Base ID 8
x
8

8.5
x
8.5		 8
x
12

8.5
x
13		 8
x
18		 10
x
10		 12
x
12		 13
x
13		 12
x
16		 13
x
18		 16
x
16		 18
x
18		 16
x
20		 20
x
24		 20
x
20		 6 7 8 10 12 15 18
Avon Chimney Pot Square 15.5 in. x 15.5 in. † †   † † † • • • •       † † † † † †  
Baron Chimney Pot Square 13 in. x 13 in. † †   † † †               † † † † †    
Bird Cage 8 in. Chimney Pot Round 8 in. †                         † • •        
Cannon Barrel Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Dorchester Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Dover Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Dover Tall Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Dry Top 8x8 Chimney Pot Square 6.5 in. x 6.5 in. †                         † •          
Dry Top 8x12 Chimney Pot Rectangle 6.5 in. x 10.75 in. † •   †                   † •          
Dry Top 12x12 Chimney Pot Square 10.75 in. x 10.75 in. † †   † • •               † † † •      
Essex Chimney Pot Square 14 in. x 14 in. † †   † † † •   •         † † † † † •  
Estate Jumbo Chimney Pot Square 14.5 in. x 14.5 in. † †   † † † •   •         † † † † † •  
Estate Jumbo Crown Chimney Pot Square 14.5 in. x 14.5 in. † †   † † † •   •         † † † † † •  
Estate Magnum Chimney Pot Square 18.5 in. x 18.5 in. † † † † † † † † † † •   • † † † † † † •
Estate Magnum Crown Chimney Pot Square 18.5 in. x 18.5 in. † † † † † † † † † † •   • † † † † † † •
Estate Magnum Tall Chimney Pot Square 18.5 in. x 18.5 in. † † † † † † † † † † •   • † † † † † † •
Estate Magnum Tall Crown Chimney Pot Square 18.5 in. x 18.5 in. † † † † † † † † † † •   • † † † † † † •
Halifax Chimney Pot Square 13.5 in. x 13.5 in. † †   † † † •   •         † † † † †    
Hampshire Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Hampshire Medium Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Hampshire Small Chimney Pot Round 14 in. † •   † † † †             † † † † †    
New Castle Chimney Pot Square 14.5 in. x 14.5 in. † †   † † † •   •         † † † † † •  
Style C 8 1/2 x 13 Chimney Pot Rectangle 6.5 in. x 11 in. • •                       † •          
Style C 13x13 Chimney Pot Square 11 in. x 11 in. † †   † • •               † † † •      
Style C 13x18 Chimney Pot Rectangle 10.75 in. x 15.5 in. † † † † † † † †           † † † † †    
Style C 16x16 Chimney Pot Square 13.5 in. x 13.5 in. † †   † † † •   •         † † † † †    
Style E Chimney Pot Square 11 in. x 11 in. † †   † • •               † † † •      
Style E Jumbo Chimney Pot Square 14.5 in. x 14.5 in. † †   † † † •   •         † † † † † •  
Style E Small Chimney Pot Square 11 in. x 11 in. † †   † • •               † † † •      
Windsor Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Windsor Magnum Chimney Pot Round 22 in. † † † † † † † † † † † • † † † † † † † †
Windsor Magnum Smooth Chimney Pot Round 22 in. † † † † † † † † † † † • † † † † † † † †
Windsor Medium Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Windsor Medium Smooth Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Windsor Small Chimney Pot Round 14 in. † •   † † † †             † † † † †    
Windsor Smooth Chimney Pot Round 16 in. † †   † † † † † †         † † † † † •  
Windsor Smooth Small Chimney Pot Round 14 in. † •   † † † †             † † † † †    
Item Base Shape Base ID 8
x
8

8.5
x
8.5		 8
x
12

8.5
x
13		 8
x
18		 10
x
10		 12
x
12		 13
x
13		 12
x
16		 13
x
18		 16
x
16		 18
x
18		 16
x
20		 20
x
24		 20
x
20		 6 7 8 10 12 15 18

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