Ratio Entry/Dome - Height & width

[MarkDLxu]

Hello Guys,
in the forum we’re talking about the ratio entry height/ dome height should be around 60-65%.
Is there also a recommendation for the width ratio?
In addition, why the vent arch width is always a little big bigger then entry arch width?
thanks
Marco

[JRPizza]

Marco, what size of oven are you thinking of building? I had done some searches for width and just ended up going with what was recommended in the FB plans. Actually I had to interpolate as I built a 39" oven and the plans are for 36 and 42". Your other question is easy - the vent arch is usually a little bigger so there is an edge (reveal) of the inner arch showing when you are done that is useful for a door to seal against.

[MarkDLxu]

Thanks for the answer!
I’d like to build something between 35-38”,
so the FB plan says 19”-20”