I have a 36" stock bifold door on a bedroom closet. Stiles are 2" wide. Top is 4.5" high and bottom is 8.25" high. These are one panel shaker doors. The stiles look a little skinny but are ok. They would probably be a good width for a narrower door. I used a cabinet knob. My 22" 5 panel doors (custom designed by the door company) have 3.75" rails in the middle, 4.25" stiles on knob side, 4.5" stiles on hinge side. They look thick. If you figure 2/3 of that, yours might be 2.5" in the middle and close to 3" on stiles. So I would say 2-3" on stiles and middle rails. Larger top rail, and even larger bottom rail. If you are matching other shaker doors in the house, take those into consideration, especially for top and bottom rails. But if you are using standard doorknobs, you need at least 4.25" stiles for the knobs to not look crowded. That only gives you about 3/4" distance from the panel. That only leaves 6" of panel compared to 9" of stile. That would look off to me. My five panel doors have about 9" of stile to 11" of panel, and it still looks thick. I think you need to have skinnier stiles and use cabinet knobs. Looking back at your design, I think you can go bigger on top and bottom rails if you want. That may satisfy your need for bigger stiles. You might be able to go slightly bigger on stiles and middle rails too. Make sure you have enough panel. As is, it looks more like cabinet doors to me than closet doors. Here is my five panel door. If you are doing only 3 panels, I would play with wider middle rails, but no wider than the stile width. (Sorry so blurry.)

I read Dan's question about the stiles as being rhetorical - you don't ever see stiles with the grain running sideways because the long pieces of cabinetry and furniture go with the grain, not against it (unless of course you're trying to use more material than necessary). To my eye, it would look strange and unsettling. I have mocked it up in my woodshop but have never wanted to build a door that way. True Shaker style shows vertical wood grain in both the door stiles and the face frame stiles. To insert a door panel with horizontal grain would make the cabinet surface look busy and interrupted. Horizontal grain on doors is a more contemporary look, and it does not fit with the more traditional Shaker profile. If slab doors don't go with the style of your home, then horizontal grain in cabinet doors will probably not fit with it either. All of that said, do what you love. If you're trying to make your kitchen integrate with the style of your home, consider that horizontal grain in Shaker cabinets will make quite a statement.

Kuyaariel - The only thing I have to add is that I noticed that on your drawers, the recessed area of the panel is very narrow, not much open space, I would hold your current handles up there and see what you think of them, if they look a bit big compared to the space available. (Did this make any sense?) Beth - So nice to see your own home and work! Looks great. I love your hood and how unobtrusive it is.

OKay why inset at all? As for thr hinges what is he using there are tones of europen type hinges to choose from I much prefer full overlay cabinets that are frameless so I need to know what the reason was forr this choice . You do realize that framed inset cabinets have a lot less storage space than framless too.