first thing, you have to size it across the curve
that makes in around 9.75 inch aka 10 inch
the 12 inch is 11.58 aka 12 inch
this is so it can fit 10x12 inch pocket .
for for the mark on the back side of the plate, that not so nice, and we have no issue exchanging that for you.
It will not effect the anti spall as that only matters on the front.
we coat the the whole plate to make it look uniformed.
that mark is from being placed on the rack when we coat the front.
as for the weight, they are around 4.4kgs each deepening on how thick the anti spall is applied.
if you have any issues, you should contact us, not #### post us on CGN
Thats not a good way to start out.
contact us at sales@sjhardware.com