Here is a new dart case I made from fleece. I made this case because I like very slim streamlined cases that can fit comfortably in your pocket. To make this case you just need a little bit of fleece a small scrap of muslin and some needle and thread and optionally a rare earth magnet if you want the case to have a closing mechanism. It helps to have a sewing machine, which I used, but it is not necessary. After all I have done plenty of quality stuff by hand.
Here is what it looks like closed:

And this is what it looks like open but I took this picture before I decided to add a muslin flight sheath:

The magnet idea came later, I was just going to have a folding fleece wallet style soft case but then it occured to me that I could leverage the steel tips themselves to keep the case closed. So I arrange it so that when folded the placement of the magnet is lined up with the points of the darts. The magnet I used is a neodymium magnet hat has quite a lot of pull.

Here you can see that the magnet is strong enough to hold that darts by their points ( and then some. In this picture they are hanging in front of my fireplace.

A close up of the stem side of the soft case: The wallet is long enough that I could keep medium length stems in there if I wanted to but I prefer short stems so I designed the soft case specifically for their length:

Here is a long shot of the entire case open before I sewed the magnet into it's round pocket:

I strted out by not dividing the stem side into three slots, but later added that for its aesthetic appeal. Of course, once I did that there was no longer anywhere to put the flights since it was no longer just a big open pocket. So my solution was to grab a little bit of muslin and sew a sheath for the flights and attach it in the middle of the open case. I thought about doing it in fleece but I did not want to add too much thickness to the soft case when it is folded closed. Below you can see that the muslin makes for a very thin sheath indeed:

I close up of the middle of the soft case:

Here you can see a close up of the barrel side of the case. I designed it specifically for my 23 gram Magnums but almost any dart will fit. I have been thinking about how to do a similar case with angled pockets for GT style darts.