Approximately 17"x 17" square, offered in 4", 5" & 6"

Stove jack canvas flap is 24" x 24"

Oval shaped so that it will fit nesting stove pipe.

Silicone ring.

6" stove jack required for wilderness and yukon stoves.

Actual Stove Jack Opening

4" :  4 1/2" wide by 5 1/2" length 

5" :  5" wide by 6 1/4" length

6" :  6" wide by 7 1/4" length