It is 50x30 with 9' ceilings. Debated on higher ceilings but my old garage had 9' ceilings and in 15 years I never needed them any higher. On real cold or real hot days, no use heating/cooling more space than I have to.
I have 2 hot rods, John Deer and snow blower, lots of tools and a Harley to put in her. Within the 50x30 there will be 2 walls to make a single room/shop/Man Cave that will measure 20x15. That is the reason for 2 service doors and 2 windows on the 50' side you see. One will enter into the garage the other the Shop/Man Cave. There will also be an 8' garage door on the interior 15' wall into the man cave in case I want to pull the Harley or John Deere into it to work on it.