I had a slight problem with a 12v fuse on the car, upon pulling it out it almost fell out!
Comparing it to a same size fuse it looked decidedly "thin" in the blade department.
I have been trying to find out the manufacturers dimensions as this one fuse is not
up to the job (the other original equipment fuse fitted perfectly)
It must be a cheap import fuse. There are four sizes of fuse that you may come across
not including the older glass fuses. Here.