This bird house is modeled after a wren’s ideal home. Wrens aren't picky about their homes and will nest in small, plain houses. Just make sure the entry holes measure about 1 inch in diameter to let the wrens in and keep predators out.
Check this out on Metal Earth
Number of sheets:
1.60" x 1.76" x 0.94" (4.1 x 4.5 x 2.4 cm)