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IKEA shelf boards: BILLY, PAX (KOMPLEMENT) and IVAR shelf sizes and thickness
What size are IKEA BILLY, PAX and IVAR shelves? · Modern device · basis: IKEA product pages (Measurements section), cited per shelf; hole size and pitch are not published by IKEA
Also called: ikea shelf thickness, billy shelf size, billy shelf thickness, komplement shelf dimensions, pax shelf size, pax shelf thickness, ivar shelf dimensions, ivar shelf thickness, ikea shelf board size, kallax cube inside size
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 13 in table
Notes
- The whole bookcase or wardrobe is not something you design around; the shelf board is. These are the boards as IKEA's product pages list them (width × depth × thickness, mm). Use them for shelf dividers, clip-on bins, under-shelf drawers, edge-clamp hooks and replacement boards.
- BILLY shelves are 20 mm thick; KOMPLEMENT (PAX) and IVAR shelves are 18 mm. IKEA notes the current BILLY shelf does not fit bookcases bought in spring 2014 or earlier.
- KOMPLEMENT widths are the frame width minus 39 mm (50 → 461, 75 → 711, 100 → 961) and depths the frame depth minus 2 or 7 mm, as listed per size.
- Not published by IKEA, so not drawn: shelf-pin hole diameter, hole pitch and hole rows in the side panels, the KALLAX cube interior and panel thickness. Owners report 5 mm holes on a 32 mm pitch for BILLY (see the 5 mm shelf pins page); measure your own unit once before drilling or printing a hole-pattern guide.
- Max load is IKEA's per-shelf figure with the load spread evenly.
IKEA shelf boards: BILLY, PAX (KOMPLEMENT) and IVAR shelf sizes and… size chart
| shelf | W × D × thickness (mm) | fits | max load |
|---|---|---|---|
| BILLY shelf 76×26 | 760 × 260 × 20 | BILLY 80 wide, 28 deep | 30 kg |
| BILLY shelf 36×26 | 360 × 260 × 20 | BILLY 40 wide, 28 deep | 14 kg |
| KOMPLEMENT shelf 50×35 (PAX) | 461 × 348 × 18 | PAX frame 50 × 35 | 12 kg |
| KOMPLEMENT shelf 75×35 (PAX) | 711 × 348 × 18 | PAX frame 75 × 35 | 12 kg |
| KOMPLEMENT shelf 100×35 (PAX) | 961 × 348 × 18 | PAX frame 100 × 35 | 12 kg |
| KOMPLEMENT shelf 50×58 (PAX) | 461 × 573 × 18 | PAX frame 50 × 58 | 20 kg |
| KOMPLEMENT shelf 75×58 (PAX) | 711 × 573 × 18 | PAX frame 75 × 58 | 20 kg |
| KOMPLEMENT shelf 100×58 (PAX) | 961 × 573 × 18 | PAX frame 100 × 58 | 20 kg |
| IVAR shelf 42×30 | 420 × 300 × 18 | IVAR side unit 30 deep | 18 kg |
| IVAR shelf 83×30 | 830 × 300 × 18 | IVAR side unit 30 deep | 35 kg |
| IVAR shelf 83×50 | 830 × 500 × 18 | IVAR side unit 50 deep | 45 kg |
| KALLAX cube opening | not published by IKEA | inserts are 330 × 370 × 330 (see the KALLAX page) | 13 kg per shelf |
| shelf-pin hole Ø and vertical pitch (all four) | not published by IKEA | measure your unit once | — |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
Xem scan
File coming
No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=ikea-shelf-boards
Fits with



Questions
How thick are IKEA shelves?
BILLY shelves are 20 mm; KOMPLEMENT (PAX) and IVAR shelves are 18 mm (IKEA product pages).
What size is a PAX shelf?
KOMPLEMENT shelves are 461, 711 or 961 mm wide (50, 75, 100 frames), 348 deep for 35 cm frames or 573 deep for 58 cm frames, 18 mm thick.
What is the shelf-pin spacing on IKEA bookcases?
IKEA does not publish it. BILLY owners report 5 mm holes on a 32 mm pitch; measure yours.