Here's a wild, crazy idea... Why don't manufacturers just sell the knife/tool with the option of a sheath to actually fit the item? You know, I buy a Vic' something or other or a LM wotsit and have the option of adding a sheath/pouch or slip etc to match (not a generic fits 4-8 layers, looking baggy, or vice-versa and ill thought out) This is particulary grating if I buy a nice slim Alox variant, at a premium and then have to make do with some poorly executed monstrosity which I wouldn't use as a pooper scooper (Vic' anyone )I know that I would have paid extra for a suitable item if it was an option. As it is Vic' LM et-al are losing my hard earned to others simply because they are lazy What say you..
I put my money where my mouth is... https://forum.multitool.org/index.php/topic,2881.msg2121894.html#msg2121894
Make your own, to best suit your needs/use.
For slimmer knives, I am a fan of the pocket slips and clip sheaths made by Collector Knives. High quality leather that wears well for an affordable price. I am doing the Soldier challenge, and it rides well in this clipped to anything. Gym shorts waistband, pockets, belt, you name it.
Dude, c'mon! Calvin Klein pouches?!
I'm in this same boat with my carryall. I have a Custom LeatherCraft that has a large pocket for my phone, two pockets that can hold any combo of knife, light, multitool, and/or a small hand tool, as well as a clip for my keys. I like it as I can carry what I need to get work done, all without looking like Batman, a soldier, or a cop with a ton of sheaths on my belt. I can't stand the Velcro, the pockets are too tall for all but my largest MTs and folders, and the key hook is a flimsy plastic one-piece carabiner that has messed up more than once. Carry options are pretty bad. Either use the tape measure-like clip and have the thing fall off; use the loose belt loop that slides all over the place, or the huge horizontal slot bigger than any belt I have ever seen, including USGI pistol belts. I'm getting a Skinth this time, in Digicam, with a quick-release buckle instead of the Velcro.
You can always stuff the bottom of the pockets with something to take up the extra space so your shorter tools or knives fit better. Examples of useful items to take up that space would be a couple of CR123 flashlight batteries wrapped in plastic, some cotton smeared with Vasoline for fire starter wrapped in plastic, a small plastic container with pills, or a micro first aid kit, or a micro fishing kit, micro screw driver bit kit, even a small magnet could sit in the bottom of those pockets so the knife or tool would sit higher and be easier to grab.