I want to recreate this gear in Blender.
As you can see, there are 14 teeth on this gear.
Tracing the shape with vertices is not an option as it needs to be exact. .
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Figures with a recurrent shape that pivots around a center are easily generated with the spin tool in the edit mode of the 3D viewport. However, since it seems like you might benefit from "editability" of the shape I would suggest a different approach.
The result should look like this:
You don't give enough details, but you could begin with a 28 vertex circle:
Extrude inwards if you want the inner circle that we can see on your photo. For the star shape itself, checker deselect to only select 14 of the 28 vertices:
Scale up or down:
Select all and bevel the vertices as much as you want:
Extrude and scale inwards with a constraint on the Z axis: