12″ (30 cm) is a great set for use on a deck, patio or in the garden

The 12″ set is also lightweight and can be transported easily. It is a little large to be played on the kitchen table but can be used in similar locations as The Eight. It is still small enough to be used as an occasionally played game and will not permanently take up floor space. Outdoors it can be located on a small Patio, Garden, Terrace, Veranda, Deck or in the yard. It is even suitable to play at the beach or at any other outdoor vacation location or event.

More info visit :
http://www.giantchess.com