what I do
Adam Cherubini
>First, there is no rule of thumb that I can detect. For small doors, I try to use the column orders. Just for the sake of discussion, let's talk in decimals:
Now I like a door whose periphery follows golden section.
So a door with a given height h, the width of the door might be h*golden section (hereafter gs). So that makes the door .618h wide.
I like the raised panel golden section of the width wide. In this case, by definition, golden section of golden section is 1-gs, so the panel would be .382h wide (.618 * .618h).
That makes the side rails (stiles) (.618h-.382h)/2 or approx .12h wide each.
Like you sometimes I use this right round the door. But when I'm feeling fancy, I impose the column orders to get the upper and lower rail sizes.
The upper rail would correspond to the column's capital. So that upper rail would be .13h high which is so close to .12 that I usually just keep the .12.
The lower rail would correspond to the plinth which woulod make it .2h.
Now I think this makes a good looking door. I'll bet if you lay this out you'll agree. Like all period woodworkers past or present, I don't slavishly adhere to this or any rule. Sometimes the stock under my bench designs the piece. But the formula, if nothing else, gives you a starting place. I hope you find it helpful.
Adam