Not at all i bought a pack with 3 different colors and sizes the black ones were 7mm diameter and shrink by 50%. Just cut to size, warm with a lighter and your done. Shrink wrap is extremely cheap so you could do 10+ clips for a couple bucks.
Heres the pack i got
Size i used was the black 0.28in, its a perfect size for clips this size
Edit for details: if you use the. 28 (basically 1/4in) you have to remember the heat shrink will only shrink to half its size(1/8in) so if the end of the clip is smaller than this you might have to try a smaller size wrap. From the picture you can tell mine shrank by more than 50% by the end of the clip so you have alot of wiggle room. (atleast with the type i got) Great thing is, if you screw it up just slice it off and try again.
Great for knives that wonder around in thinnner pocket materials, this knife would migrate to the middle of my back pocket instead of staying put in the corner, this completly stoped it.
