I sorted the huge lot of belt buckles I have into solid brass or mixed (brass but with a steel tongue) and steel.  I will try not to mix them up.  These range in size and hopefully you can see the markings on the board to decide about the size.   These seem to be brass.  A magnet will not stick to the buckle.  I can't take too long to describe the lots as there will be so many.  I put in 6 brass belt keepers and a brass ring.  Maybe someone will have a use for them.  From a smoke and pet free home.  I do not accept returns unless I have misrepresented the item in the description.  The photos are part of the description.

I have concerns now. I assumed that many of the buckles I have are brass even if they do not have  "solid brass" on the buckle.  I may have included stainless steel buckles that are simply not magnetic.  I have tried to decide correctly is a buckle is brass or steel.  But unfortunately there may be some in a lot which are simply non-magnetic steel.