![Ikea BILLY Extra Spare Square Shelf (For 40x40cm Bookcase), White, 36x38cm, With Pegs, 304.019.30 : Amazon.co.uk: Home & Kitchen Ikea BILLY Extra Spare Square Shelf (For 40x40cm Bookcase), White, 36x38cm, With Pegs, 304.019.30 : Amazon.co.uk: Home & Kitchen](https://m.media-amazon.com/images/I/61gHN0pnVcL._AC_SL1500_.jpg)
Ikea BILLY Extra Spare Square Shelf (For 40x40cm Bookcase), White, 36x38cm, With Pegs, 304.019.30 : Amazon.co.uk: Home & Kitchen
![Ikea BILLY Extra Spare Shelf for Bookcase, White, Includes Pegs, 102.652.93, 36x26cm : Amazon.co.uk: Home & Kitchen Ikea BILLY Extra Spare Shelf for Bookcase, White, Includes Pegs, 102.652.93, 36x26cm : Amazon.co.uk: Home & Kitchen](https://m.media-amazon.com/images/I/71CpSmmWdrL._AC_SX679_.jpg)
Ikea BILLY Extra Spare Shelf for Bookcase, White, Includes Pegs, 102.652.93, 36x26cm : Amazon.co.uk: Home & Kitchen
![Ikea BILLY Extra Shelf For Bookcase, Oak Veneer, 36x26cmx2 Centimetres, Includes Mounting Pegs, 602.652.95 : Amazon.co.uk Ikea BILLY Extra Shelf For Bookcase, Oak Veneer, 36x26cmx2 Centimetres, Includes Mounting Pegs, 602.652.95 : Amazon.co.uk](https://m.media-amazon.com/images/I/81a1DBzQIUL._AC_SX425_.jpg)
Ikea BILLY Extra Shelf For Bookcase, Oak Veneer, 36x26cmx2 Centimetres, Includes Mounting Pegs, 602.652.95 : Amazon.co.uk
![Before and after - experimenting with adding extra shelving on the Billy Bookcase : r/MangaCollectors Before and after - experimenting with adding extra shelving on the Billy Bookcase : r/MangaCollectors](https://preview.redd.it/agosuvh7d8x51.jpg?auto=webp&s=854c9d4b00d19e35c845fce19287388a3d349501)