Audit by category and length
Pull everything out and sort it into hanging and folding piles, then split the hanging pile by length. Shirts, jackets and folded trousers need about 100 cm of drop; dresses and long coats need 150–170 cm. Measure the total rail length each group fills when hung at a natural spacing — around 2.5 cm per shirt and 5 cm per coat. These two numbers, linear rail and drop height, define the wardrobe more than any brochure will.
Count shoes in pairs and measure your bulkiest knit. Folded jumpers typically stack well to 25–30 cm high; beyond that, piles collapse when you pull one out.