| Chimney Cap Size | Fits Outside Flue Width of | Fits Outside Flue Length of | Screen Mesh Height |
| 8" x 8" | 6 1/2"" - 8 1/2" | 6 1/2"" - 8 1/2" | 8" |
| 8" x 13" | 6 1/2"" - 8 1/2" | 11 1/2" - 13 1/2" | 8" |
| 8" x 17" | 6 1/2" - 8 1/2" | 16 1/2" - 18 1/2" | 8" |
| 13" x 13" | 11" - 13 1/2" | 11 1/2" - 13 1/2" | 8" |
| 13" x 17" | 11 1/2" - 13 1/2" | 16 1/2" - 18 1/2" | 8" |
| 17" x 17" | 16 1/2" - 18 1/2" | 16 1/2" - 18 1/2" | 8" |