This case was made for an e-cigarette, but a little shorter version can hold a pickset as well.
(This is about making the case, not what it's used for)
First I cut an old leather belt into 2 pieces and sewed a velcro and a belt clip on them:

The leather strips are about 3.5mm thick, so I drilled 1mm holes into them and sewed them together on one side only:

After putting it into water the leather became soft and I formed it using a steel rod. When dry again, I drilled & sewed the other side. Then I watered it again and formed / drilled / sewed the round bottom. After drying, the leather case will keep its shape:

The stitching on the flap isn't for decorative purposes only, it also fixes the 2nd part of the velcro:

After smoothing the edges with sandpaper I applied some shoe polish to make them black again:

Done. Took me about 6..7 hours incl. planning and I didn't use any special tools except a drill.
Originally I posted this images on a vapers forum but I hope you may find them interesting, too.
@zeepia: I absolutely like your magnets. Maybe I'll do something similar.
