Coveside Bluebird Bird House, Slate Guard - This house with a 4x4" floor is suitable for most common backyard birds including bluebirds, titmice, swallows, nuthatches, chickadees and wrens. The 1-1/2" hole is protected by a slate predator guard to ward off pesky squirrels. Dimensions: 12-1/2"h x 6"w x 8-1/2"d ~Brand: Coveside ~Availability: Usually Ships Within 3 Business Days