Product review (5 stars): Amana Stove - I measured the HOLES on the STOVE: Small 6.5" and Large Hole 8-3/8"
These fit perfectly. Couldn't be more happy.

I have an Amana Stove. I measured the HOLES on the STOVE.

The small hole on the stove was 6.5" wide.

The large hole on the stove was 8-3/8" wide.

As for durability only time will tell.