The Trondheim Nest Box has a 28mm entrance hole, which has been specifically designed for smaller birds such as the Blue Tit. This box is made from birch wood, which gives it a natural appearance. It also has some lovely finishing touches such as the smooth sawn sides and black roof. We think this box would look great in both a natural woodland setting or modern garden. The roof can easily be unscrewed for cleaning out the nest box.  It is recommended that the box is hung at least 2 metres high and you do not need to fill the box with nesting material.  This is a natural product and therefore dimensions may vary. Take a look at our other Birch Log Nest Boxes.