Here are my pantry cabinets, very similar in size to your design. Each cabinet is 29" wide, 14.5" doors, 2.5" stiles, 2.5" rails & 8" bottom trim.

FWIW, in door-building the stiles run all the way from top to bottom, the rails fit between them.

I like what you've drawn. My anal, OCD eye finds balance in it.

Although it looks fine, what type of hardware (handles/knobs) are you using? If you're using interior door hardware, some require more than 2.5". If you're using cabinet hardware, you should be fine. If these are full height doors, more like interior doors, personally, I'd rather see something more like 3.5" stiles and enlarge the top rail along the same lines. But that would also reduce the amount of panel.

I agree with Sombreuil, the rails should run between the stiles.

As others have said, the stiles should run through.

For symmetry, you should make one stile on each door about 1/2" wider, since when closed a portion of door stays in pocket. I'd go 3" and 3-1/2", and at least 3" on top rail.

I also think the bottom rail should be a bit taller, maybe 7"-8",

Here's ours. Cabinet on left is 24" wide. Fake panel is 12".

I like it, although I think I'd make the two center rails 2.5".

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.)

romy - Thank you - it's most helpful to see the sizes in person.

Casey - I knew something looked off, thanks.

Christine -good to hear, thanks! (I trust that eye, you inset queen you!)

Simcoe, excellent point. Here is my inspiration, less the glass. I like the handles shown here and assume DH will build his usual jig to accommodate the pull. How much room would you suggest for the pull I include below?

Here are three options per your suggestions:

cookncarpenter - That makes sense. Per Johnson Hardware, with the converging pocket doors (i.e., two), I was told that the spec for the doors is exactly the same size (none is hidden), because there is no center jamb, which confuses me. I will call back.

nhbaskets - those look wider than 24" and 12, very nice! Thank you for posting.

Linelle - Below is option D, with 2.5" rails (I like!) - but is the lower rail too tall?

Jane - thank you so much for including your detailed dimensions. You raised the point of asking whether I'm matching other shaker doors in the house; no, slowly moving towards MORE shaker doors in the house:) Your 5 panel door is lovely!

Here's option E, with thicker middle and upper rails, as you suggest:

Of the options shown, any preferences? Thanks very much, I so like getting the details right!

I like E. Seems beefier / more substantial.

I like 'E' as well. The handle pictured notes it as 2 1/4" wide. With a 3 1/2" stile, that only leaves 5/8" each side of the handle. Not that it's exact to scale but it would be close to how I've shown it in the picture. You may want to increase the width of the stiles a little more. Maybe to 4"?

I like E too, but I think you can go wider at the bottom. However do figure out where your knobs will go, because they look nice centered on the middle panel, or they might look nice 1/3 or 2/5 panel height away from a middle rail if centered doesn't work out. Think about putting the knobs at standard door height.

if you are getting shaker doors for other rooms, mine from home depot special order (not custom) are 9.25" at the bottom and 4.5" at the top. The bifolds have a shorter bottom, about 8.25", same top. I have made an effort to top-align all my doors and trim where I can and when it looks right. I also appreciate that all the base rails are the same height within a visual space. (I have 5 shaker doors really close together.)

I like E as well, although I agree with Jane, the bottom rail looks disproportionate, and needs to be taller, maybe 9"

Thank you for the feedback. Simcoe, you were very close with your mock-up! Jane, thank you for your Home Depot dimensions. Good point about the base rail height.

Here is a new sketch-up to spec, with the 9" lower rail, 3.5" inner stiles, 4" outer stile, 5" upper rail. Regarding placement, I like 1 or 2 (lower than centered).

This gives 9/16" on each side of the handle. I'm worried about increasing the stile width, because I'd need to do the same on the other side; reducing the middle panel by an inch.

I think I'm there ... well, almost. It just struck me that I don't know what's required to close the converging pocket doors, once fully opened, as both doors will be fully recessed into the walls.

A latch of some sort, but that's where the pull is, no?

I would place the side pulls at 36" to center off the finished floor, which is standard door knob height.

For the edge pull, you need something like this or this

Also you might consider a narrower side pull, not eating up as much of the stile width.

For example, here is a 1-1/2" wide pull on a 4" (exposed) stile on closet doors in our house...