Ha, found it more quickly than expected -

https://www.audioappraisal.com/build-diy-hi-fi-rack-using-ikea-lack-tables/

Each table is 550mm square, choice of colours and about £6 each level

......No I don’t work for ikea (tho partial to the occasional plate of meatballs wink )

Gary

Main : 598, 568.2mm, DSP 5000.2's (smilies) L + R , DSP 5000.3 C (smiley) DSP 5000.1’s Rears
Vinyl : Thorens TD150 MkI, SME 3009
Den (None M kit) : Cyrus CD6, Cyrus III, Mission 753’s