![Why would there be an extension option for the tall BILLY but not the short one? I bought the extension in the clearance section, already assembled, so no hardware came with it. Why would there be an extension option for the tall BILLY but not the short one? I bought the extension in the clearance section, already assembled, so no hardware came with it.](https://preview.redd.it/a8cz4plo0wz51.jpg?auto=webp&s=e64a7989b51cfb1a2376dec1ce99908fa9c20fff)
Why would there be an extension option for the tall BILLY but not the short one? I bought the extension in the clearance section, already assembled, so no hardware came with it.
![Billy bookcases from IKEA, with height extensions and glass doors | Дубовые книжные шкафы, Идеи икеа, Комнатные идеи Billy bookcases from IKEA, with height extensions and glass doors | Дубовые книжные шкафы, Идеи икеа, Комнатные идеи](https://i.pinimg.com/originals/77/6b/a8/776ba88a78e3b439826032642a69cd63.jpg)
Billy bookcases from IKEA, with height extensions and glass doors | Дубовые книжные шкафы, Идеи икеа, Комнатные идеи
![How to give an Ikea Billy Bookcase a built-in look. Full tutorial. | Ikea billy bookcase, Billy bookcase, Home office furniture How to give an Ikea Billy Bookcase a built-in look. Full tutorial. | Ikea billy bookcase, Billy bookcase, Home office furniture](https://i.pinimg.com/originals/de/52/22/de5222be3d85da4fcf428cf6ce89932b.jpg)
How to give an Ikea Billy Bookcase a built-in look. Full tutorial. | Ikea billy bookcase, Billy bookcase, Home office furniture
![IKEA Billy Bookcase - How to add a height extension to a short bookcase with no pre-drilled holes! - YouTube IKEA Billy Bookcase - How to add a height extension to a short bookcase with no pre-drilled holes! - YouTube](https://i.ytimg.com/vi/zLu3u9KNtTA/maxresdefault.jpg)