Lets Clear the air on the SD card capacity

I have heard conflicting info about the SD card size capicity. Several i have heard up to 64GB
Others i am hearing only up to 32GB which is what the current OS7 is capable of.
I am thinking that my shiny new 64gb ultra will work fine in the new Z10 but just wanted to throw it out there for you guy to comment on.

Thanks in advance!!!