Looks like a ring and a bracelet

[NadiG]

But it could also be very less interesting.. what do you guys think? it is made from Iron mainly.

 

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[NadiG]

Diameters for the "bracelet" is 7,5, the "ring" is 1,8.

 

[desertexplorer]

By comparing the ring size to your hand I’m assuming your sizes of 7,5 and 1,8 is actually 7.5 and 1.8 centimeters. That would put your bracelet at 3 inches which would be near the size of a horse ring.
The other ring looks like a 5/8” lock washer but without a side view it’s hard to tell for sure.

 

[bradyboy]

id say a used washer
originally offset at the split
brady

 

[ANTIQUARIAN]

I have no idea what your smaller 'ring' came from?

But the larger 'ring' looks similar to horse harness or gag-bit rings that I find.

Dave