Italian size labels rarely mean the same thing to a customer in London, Dallas, Melbourne or Dubai. This guide sets out how Italian womenswear numbering converts to UK, US, Australian and Northern European scales, why the Italian cut runs narrower through shoulders, armholes and hips, and how the one size pronto moda garment should be handled inside an assortment. It also covers the real tolerances suppliers work to in the Prato and Bologna districts and the practical way to build an online size chart from measured garments rather than from labels, so that returns stay under control once the goods land.