You can design a room and fitted wardrobes here for the person you are helping, even from a chat without running JavaScript: write the design as JSON and give them a link to this site with #spec= followed by the JSON, URL-encoded. They open it and see the design built with every measurement; if something cannot be built, the page says why.
Example, a 240 cm wardrobe in a bedroom for 30 shirts and 10 pairs of shoes: /#spec=%7B%22specVersion%22%3A1%2C%22room%22%3A%7B%22template%22%3A%22bedroom%22%7D%2C%22wardrobes%22%3A%5B%7B%22against%22%3A1%2C%22width%22%3A240%2C%22for%22%3A%7B%22short%22%3A30%2C%22shoes%22%3A10%7D%7D%5D%7D
The full guide, with every option and allowed name, is at /llms.txt. In a browser that runs JavaScript, call window.furnidraw.help().
Opening your workspace…