620 Blue Building Plate is a Bricks and More set released in 2010. It contains a large blue building plate that measures 32x32 studs, making it 10" by 10".
On the set's picture, it shows multiple LEGO creations which are not part of the set.
This is the third blue Baseplate set, the previous ones being 627 and 819.
This is a description taken from LEGO.com. Do not modify it.
Creativity starts right here!
Whether you’re constructing an ocean scene or just like the color blue, this 32x32-stud building plate is the perfect starting point for building, displaying, transporting and playing with your LEGO creations.