Find out from your cabinet source what the inside width of the drawer would be and go from there. A 6" drawer might actually have much less interior width than 6", especially if it has side-mounted glides rather than bottom-mounted. For example, my smallest drawers have a 12" face (full overlay) but the interior width is only 8.5". (This surprised me when I measured it just now.) I store towels and cloths in the top 2 and in the bottom my Cuisinart (it's fairly deep.)

Next to your cooktop you could store ladles, spoons, etc. But not very much in a 6" drawer I'm afraid.

FWIW I have a 30" warming drawer that I use frequently, but it could be narrower. The widest thing I put in there is probably a pizza box, and I think even an XL would fit in a narrower drawer. I have more than enough room for the things I usually put in there (casserole dishes, bread baskets, etc.)

I have one six-inch bank of drawers that are a filler rather than a full cabinet and the inside of the drawers is about 4" square. They have no glides, they just pull out as a box. We keep knives rolling pins and other long utensils in some of them and small items in some of them.

I'd try to figure out a way to skip symmetry, or quite frankly, skip the warming drawer. Do you have more than one oven already? Could you make do without the warming drawer. It would also be better to offset the warming drawer and do one stack next to it rather than center it and doing 2 smaller banks.
I think the narrow spaces might work better as pullouts rather than drawers if there is no way around them. They could hold your oil/vinegar/cooking spray/cookie trays/spices (on top) etc....

They are actually 9.5 inch drawers, but only 6 inches inside usable space.

This is the cabinet being modified. The top drawer would be changed to accomodate the warming drawer. I initially proposed using the 24 inch on one side. The cabinet maker suggested putting it in the center with 2 drawers on each side. He said I could use any size WD that way.

I have the double/single oven, but so many of my friends said I really need the warming drawer.

I store matches, wine corks and old, cutesy birthday cake candle holders (used during my childhood, too) in my 5" wide drawer (that's inside measurement). I rarely open it. Matches are only used to light candles when the power goes out or for holiday dinners. I toss wine corks in when I open a bottle that isn't screw top (don't knock it, some really good wines are coming out with screw tops. I plan to make a trivet with the wine corks some day soon). And the birthday candle holders ... let's see my kids are now 18 and 20 so they outgrew this kiddy stuff a long time ago. Oh, wait, it also holds a moisture sensor for container plants. Can't remember the last time I used that (hello, Good Will). The drawer is pretty much wasted space, IMO.

I have too many small space cabinets and drawers in this kitchen and I can not wait to get rid of them when we remodel!

I did double ovens and a warming drawer and the warming drawer is nice, but it would be the first thing I'd part with. I'd probably use it more if it didn't take longer to heat to warm than the oven does to heat to cooking temps. My micro drawer also has a keep warm setting that works for many things. Other micros might too. Had I known that, I might have done without the warming drawer, but I have it. I just wish it didn't take so long to heat.

Mine is 24" because that was the only size I could work in and I figured it would be used most for a single plate or couple of dishes. It works well for that. It also holds 2 or 3 large pizza boxes or more tortilla chips, taco shells and popcorn than you can imagine a bunch of teens enjoying. If you think you will be using it frequently for multiple dinner plates or a number of serving dishes, then you might want larger.

Do YOU think you need the warming drawer?

But to answer your question, I have a number of 15 inch drawers in my breakfast room hutch and they are very useful, but inside the kitchen itself my smallest is a 21" frameless cabinet, probably 17+-18" interior space.

I have a face framed 12" cabinet (42" height) with 2 stacked drawers that have ended up having about 7 3/8" of storage width. The top drawer has an extra inch of height over the other standard top drawers which has been handy to store some of my slightly taller items and stack measuring cups. I'm assuming since your drawers will be next to the warming drawer they will have that extra height as well.

I also have a 30 inch warming drawer. While most times it is bigger than I need, there have been a few instances in the last year where I needed every inch. You would probably be fine with 27", but it won't give you much more usable space in the drawers. If you have a large gathering (or less than punctual family members like I do) the 24" drawer may not be big enough.

From the limited picture, it looks like you probably have enough storage in your very pretty kitchen, so that a few unique, less useful drawers wouldn't be a problem. Only you can decide which trade offs work best for you.

OT - lascatx, which brand do you own? I'm considering adding one when we remodel but I've never heard the concern that they take a long time to warm up. Wonder if it's the same with all warming drawers or if it's only a few or perhaps only one brand that has this issue. TIA!

I have a GE Cafe range with a small bottom oven that I thought I would use all the time since it's just DH and me. It takes waaay longer to warm up than the regular oven (due to a much smaller power unit,) so I never use it. Might be OK for a warming drawer, since it wouldn't have to get so hot, but I've never used it that way either.

Please excuse the very unfinished kitchen and temp counters! We have a 9" space next to the range that has a 7" drawer and 2" filler. The interior of the drawer is 5.5" and is perfect for the bbq junk that has never had a good home before. My wok lives in the cabinet underneath - was actually designed for it - love it!

Lisa- I was warned by a friend about the long warm up time of her warming drawer so I opted for the Miele. It has a convection fan in it that heats the drawer fairly quickly - in about 10 minutes. I'm pretty sure Wolf had a convection fan as well and maybe more manufacturers have added that feature since I bought mine last year.

"...drawer on each side that is only 6 " wide inside..."

Does that mean a 6" wide cabinet or a 9" (or so) cabinet that has a 6" wide drawer inside? Is that 6" the inside drawer width or the entire drawer width (including the drawer sides)?

If you have 6" (or 9") on either side of your cooktop cabinet, I would consider one of two things:

(1) Getting a 6" (or 9") filler pullout for each side (more on that later)

(2a) 9" cabinet: Get a 9" wide tray cabinet.

(2b) 6" cabinet: Leave the gap and get a door to cover it to use it as a plain cabinet w/no face frame. You could store a couple of cutting boards or some trays in that space. Maybe put a shelf in the top portion for small items. You would have to "build" a floor for the cabinet, though.

With cabinets, you lose anywhere from 1" to 1.5" due to walls for frameless cabinets and 3" to 4" due to the walls & face frames in framed cabinets. If you now add drawers, you then lose the thickness of the drawer boxes' sides (2 sides) as well as the "clearance" space needed for the drawers to clear the walls or face frames. For a 6" cabinet, that's a significant percentage of the space. Even with a 9" cabinet it's quite a bit.

Filler pullouts, OTOH, are pullouts that attach to the cabinets on each side of the space (i.e., the side of the cooktop cabinet on one side and another cabinet on the other side). They have no cabinet walls or face-frames of their own. This maximizes the amount of usable space.

Filler pullouts come in a variety of configurations. They can be spice pullouts (be sure the shelves are adjustable if you go this route), they can be pegboards for hanging pot&pan covers/utensils/etc., or they can be magnetic boards. Base cabinet filler pullouts have the most options...ranging in width from 3" to 9". Upper cabinet filler pullouts only come in 3" & 6" widths.

I've linked to Rev-A-Shelf's base cabinet filler pullouts below so you can check out your options. BTW...don't buy them from RAS directly...the last time I looked, they were far cheaper elsewhere!

I have double ovens, a MW w/"Keep Warm", and a 30" WD...and I use all of them frequently. Here's what I've discovered: The MW drawer's "Keep Warm" option continues to cook the food, even with the low power level it uses. I only use it for very moist items that I don't mind if they're overcooked...which means not much!
The ovens tend to dry things out when using the "Warm" option. In addition, you have to heat the entire oven cavity to use it as a warmer.
We use our WD most days of the week (I'd say 5 or 6 days a week). You do have to remember to turn it on when you start cooking, but even when I forget, my WD seems to heat up fairly quickly. (I have a GE Profile WD...just a basic WD, no fancy bells & whistles. For moist/crisp, you open/close a little opening.)
The other thing is that if you use your MW or oven as a WD, you then cannot use them for their major purpose...as a MW or oven.

Here is a link that might be useful: Rev-A-Shelf Base Cabinet Filler Pullouts

Thanks for all the responses.

The space left will be 9.5 inches wide, 10 inches tall and 27 inches deep. My cabinet maker says that will leave room for the inside of the actual drawer to be 6 inches deep, 8 inches tall and I don't know the depth.

I have a drawer underneath this one, so tray storage would be out, and I already have that next to it.

I am looking at the KA warming drawer because it roasts meats and can be a crock pot.

Cutting boards? I think mine are probably a little bit bigger than that, but I have a narrow tall drawer designed for cutting boards that I love...

hot pads? rolling pins? BBQ skewers and utensils (as mentioned?) spatulas, spoons, ladels ... I imgaine you'll figure out a way to use it if it feels this is the only way to design the drawers. But if the only reason you're getting a warming drawer is because your friend thought it was a good idea, it's possible you could become comfortable with losing it. I'm sure this is another one of those how-you-cook issues. If I ever felt I needed warm plates and the like, I would just put them in the regular oven briefly, but it is a rare occasion when I do that, I'd feel differently if I felt the urge to warm plates regularly. In the meantime, just setting a towel over the plates with them stacked in a warm location can work wonders.

keeping one of those spaces a tall one (not drawers) / slide out you could use it to put an oven rack when not in use or one of those fold down step stools. broiler pan?