It is small & flexible but very strong.
It is 3mm across the closed coil & 1-1/16" wide side to side.
This 3mm zipper is the size you find in the store as a dress zipper or for craft projects.
Buying this standard coil zipper by the yard or as
continuous coil/chain means that you can cut off exactly
what you need for your project.
No, you cannot make this into a separating or jacket zipper.