SP_Rocket

Hey guys quick question, I tried to find this but all i kept getting was everyone switching to different exhausts, I wanted to know what size gaskets do I need for my stock exhaust? It's a 93 fd rx7. I need two gaskets one from the stock mid pipe (cat) to the muffler and from the mid pipe to the down pipe. It's all stock I just don't want to order wrong size gaskets. My guess is that they are 2.5" but not sure?
Thanks guys.