Does anyone know the dimensions of the core rulebook and the rules in the big box expansion?

Approximately 6" wide x 9" tall.

It's just 8.5x11 pages folded in half, isn't it? Which would make it 5.5x8.5.

Although, this

...the rules in the big box expansion?

It's just 8.5x11 pages folded in half, isn't it? Which would make it 5.5x8.5.

Although, this

...the rules in the big box expansion?

Makes me think you're in the wrong forum and you really wanted Imperial Assault?

Actually threw a ruler on it and it's 6" x 9". I think it's a metric sized sheet (or whatever it's called) and not a stock U.S. size.