Linnies are very difficult to breed, and this nestbox helps them be successful. They enter on one side, and walk to the eggs, so they are less likely to break them. Dimensions are 9"L x 6"W x 6"H. It comes with a removable insert with a cutout to keep eggs from rolling around. Bent nail keeps the lid closed. 

Works well for Lovebirds, Bourkes, Scarlets, English Budgies or similar as well.