Hi Claire, if you click on the ‘John Lewis’ link in my post (it’s not an affiliate link) it will take you to the page for the box I bought. It’s the 21 litre box, and although it says it’s by John Lewis, it is actually by The Really Useful Boxes company. If you want the bigger inserts for this box, you’ll need to buy it direct from them as John Lewis don’t have it- click on the link where it says ‘6 larger compartments’ you’ll find it there. You could buy the box direct from them too if you prefer – there’s a link to it on the inserts page I linked up to. Hope this helps! Clare 🙂