Handmade Grass Nest Creative Birds's Cages Accessory Dove Nest Bird's Nest Product Size: Length: 22 CM/ 8.66 INCHES; Diameter: 18 CM/7.09 INCHES ; Hole diameter: 15 CM/5.91 INCHES. Made of natural Straw material and is completely safe for animals. Create a pastoral and rustic style in your home, porch or garden, with these woven grass bird huts. Individually hand woven so each piece is unique. Encourages natural breeding and nesting behaviors in birds.