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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

shelfW × D × thickness (mm)fitsmax load
BILLY shelf 76×26760 × 260 × 20BILLY 80 wide, 28 deep30 kg
BILLY shelf 36×26360 × 260 × 20BILLY 40 wide, 28 deep14 kg
KOMPLEMENT shelf 50×35 (PAX)461 × 348 × 18PAX frame 50 × 3512 kg
KOMPLEMENT shelf 75×35 (PAX)711 × 348 × 18PAX frame 75 × 3512 kg
KOMPLEMENT shelf 100×35 (PAX)961 × 348 × 18PAX frame 100 × 3512 kg
KOMPLEMENT shelf 50×58 (PAX)461 × 573 × 18PAX frame 50 × 5820 kg
KOMPLEMENT shelf 75×58 (PAX)711 × 573 × 18PAX frame 75 × 5820 kg
KOMPLEMENT shelf 100×58 (PAX)961 × 573 × 18PAX frame 100 × 5820 kg
IVAR shelf 42×30420 × 300 × 18IVAR side unit 30 deep18 kg
IVAR shelf 83×30830 × 300 × 18IVAR side unit 30 deep35 kg
IVAR shelf 83×50830 × 500 × 18IVAR side unit 50 deep45 kg
KALLAX cube openingnot published by IKEAinserts are 330 × 370 × 330 (see the KALLAX page)13 kg per shelf
shelf-pin hole Ø and vertical pitch (all four)not published by IKEAmeasure your unit once—

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

IKEABILLY shelf 76×26 (product page, Measurements)webPublisher's page; dimensions are facts
IKEABILLY shelf 36×26 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAKOMPLEMENT shelf 50×35 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAKOMPLEMENT shelf 75×35 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAKOMPLEMENT shelf 100×35 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAKOMPLEMENT shelf 50×58 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAKOMPLEMENT shelf 75×58 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAKOMPLEMENT shelf 100×58 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAIVAR shelf 42×30 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAIVAR shelf 83×30 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAIVAR shelf 83×50 (product page, Measurements)webPublisher's page; dimensions are facts
IKEAKALLAX shelving unit 77×77 (no interior listed) (product page, Measurements)webPublisher's page; dimensions are facts

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.

Let your AI pull this. Add 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.
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Plain text: sheet.txt · JSON: /api/geometry?object=ikea-shelf-boards

length
Schematic, not to scale.

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.