These multi-hole nest boxes offer a one stop solution for housing the birds that visit your garden. The entrance is interchangeable between open-fronted, (perfect for Robins, Wrens, and Pied Wagtails), a 28mm hole and a 32mm hole. Simply pop out the unneeded entrances and the bird box is ready to provide shelter. Offering 1.5cm thick wooden walls for insulation, these birdhouses come in a great value pack of two allowing you to position them at different vantage points. The boxes measure 30cm x 20cm x 17cm.