This is handmade. Suitable for small birds such as雛 (hinahina - chicks), young birds, Java Sparrows, Zebra Finches, and Bengalese Finches. Entrance diameter: Approximately 7 cm Depth from entrance: Approximately 14 cm Nest hook is not included. Nest hooks are sold separately. It will be an additional 200 yen. If you would like one, please comment and I will make the changes. The color of the nest hook is random. Desired colors are an additional 50 yen. (White, Blue, Pink, Yellow) As this is handmade, there may be slight individual differences. If you are concerned about minor details, please refrain from purchasing. m(_ _)m May your beloved bird and owner have a happy time together ☆*:.。. o(≧▽≦)o .。.:*☆