This is a gauge for measuring fillet welds.
I am a welding inspector and designed this with the right sizes.
A-size and throat thickness oversize according to ISO 5817 quality level C.
Added also one with flat throat to measure inadequate throat thickness.
See the added picture for this.
The numbers are in mm units With the b-size you can check your print accuracy.
One model with outward letters for multi-color or with inward letters.
I appreciate if you show me your print(s).
The model is 2 mm in thickness but you can scale the z-axis