Rear Brake question

1965 plymouth barracuda Formula S

I have removed all four brake sets. I want to replace shoes, wheel cylinders, and spring kits.

Front Drums measure 10" X 2 1/4 " Rear Drums measure 10" X 1 3/4 "

Here's my question: I have been looking on all my parts sites, and I don't see a rear drum that has those measurements. Am I correct that the rear brakes are 10 inch?

Perry
RockAuto shows the rear drums in stock.