LOL! I seem to be finding all your threads. This one is sinking, so I'll tell you what I did. My whole kitchen is 100% custom to my design, made by a local cabinetmaker, so you might have different results with standardized sizes if you're buying commercial.

For widths, I got as wide as possible. I have a U so I have 2 sets of corner drawers. Those are 36" units. I suppose it's possible to make them different sizes, but that's standard and works well. From the corner to the oven structure are 31.5" wide drawers. On the other side are 48" pot drawers under my 48" hood. Then the DW and the sink cabinet (ROTS in the bottom under the sink not only makes it more convenient to reach the back, when a plumbing adjustment has to be made the whole thing can be taken out without emptying it. Between the sink cabinet and the other corner is the trash with a drawer above. Between the corner and the Advantium/fridge/freezer structure is a little 11.5" wide (exterior measure) pullout (for bread, cereal, etc.) in the extra space.

I want fridge drawers in the middle of my small island. There's a sink cabinet on the side that determines the width of the right hand drawers (19.5" exterior). The left hand drawers (14" exterior) are what's left. Behind the drawers on the other side is a big pullout caddy for boards.

Under the ovens and Advantium are two large drawers, the full 30" wide. One is 11.5" deep (interior height) and the other is almost 15" deep (interior), each with a 4" ROTS inside (3" interior). Plus the 6" deep x 30" wide drawer I have under the Advantium for the trays, potholders, etc.

I also have five small, shallow drawers in my butler's pantry area for serving pieces and extra flatware, again the width that fit. There's a full height spice rack by the ovens and a pitcher cupboard the same height.

As I said, biggest possible. No extra divisions. I measured all my stuff and decided that I could fit whatever I wanted, where I wanted if I had the same depths all the way around the perimeter. My tall canisters and stock pot are 11" tall, so my bottom drawers are 11" inside (13" outside, full overlay). For utensils and stuff I thought 4" inside (6" outside) was adequate (I have hanging (pegboard) storage for weird stuff like the egg beater). That left 9" inside (11" outside) which fits my medium canisters, bread bowl, and allows me to stack a few pots. My small appliances all fit in the deep drawers under the ovens. The pizza stone, which is amazingly heavy, goes in the pullout under its oven.

I have baking pans and bowls in the 31.5" drawers. Canisters and utensils in the baking corner; flatware, plastic containers and tea towels in the sink corner. The top drawer under the cooktop is vestigial (most of the depth is stove), but it holds grill pans, spatter screens, wooden spoons and stirrers, meatforks, etc. Knives, wraps and bags, gadgets and tools in the narrow island drawers, of which there are four, and colanders and graters in one of the wide, deeper drawers, mixing/prep bowls in the other.

That's a very longwinded way of saying, measure everything and make sure it'll fit where you want it to fit, and make sure you have a place to put away everything you need to put away. You can always put organizers or dividers in wider drawers, but you can never get back the space you waste by putting narrower drawers in. Cutting three feet in half loses you not only the inch and a half of the actual cabinetry, plus the width of the rails, but also the area where handles can cross, little things can be fit among bigger things, etc.

Brevity is not my strong suit. I hope this is helpful.