![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 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
![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 Bookcase assembly, joining BILLY Bookcase and wall fixing of Ikea BILLY Bookcase - YouTube IKEA BILLY Bookcase assembly, joining BILLY Bookcase and wall fixing of Ikea BILLY Bookcase - YouTube](https://i.ytimg.com/vi/CPFW-5y_qb4/maxresdefault.jpg)
IKEA BILLY Bookcase assembly, joining BILLY Bookcase and wall fixing of Ikea BILLY Bookcase - YouTube
![IKEA Billy bookcase tip: if you have an OLD Billy bookcase (pre-2014) you can still add extra shelves even though the new extra shelves from IKEA use a new, disc-shaped shelf pin. IKEA Billy bookcase tip: if you have an OLD Billy bookcase (pre-2014) you can still add extra shelves even though the new extra shelves from IKEA use a new, disc-shaped shelf pin.](https://preview.redd.it/tp19ukx1oll61.jpg?auto=webp&s=4ecb427cb866ab36d7504f0adf06ee826d11bf49)