When the military needs small cord to help secure their gear, they use this 3/32" Tether Cord. This U.S. made tether cord is also called "Sensitive Item Securing System". It's used throughout the military to secure things like strobe lights, compasses and knives to the operator.
Fisherman Knot Static Breaking strength of tether cord 244lbs. ( Tested by Rescue17 )
300 Foot Spools
my Grand Nephew's Birthday present also contained this: he has learned to make 550 cord Bracelets, so I thought he should see some other stuff, but I have Rolls of this stuff and it comes in handy.
I'm not using it in a particularly utilitarian fashion but the cord has served my purposes perfectly. It's thinner than 550 paracord and only has 2 strands inside so gutting it doesn't make it sit super flat. The smaller diameter is nice for making zipper pulls and smaller lanyards for keychains. I always felt paracord lanyards were a bit big but you can make the exact same things with this smaller cord. Accenting paracord lanyards with micro cord like this seems to be a thing too. It's still nylon so ends melt and hold well. I've wrapped almost every pencil I own with this stuff. The best part is that it's less than 1/3 the cost of paracord so you can afford to waste it.