US misses numbers (00, 0, 2 and up) are older catalog labels with no direct link to a measurement, which is why the two scales sit about 32 apart
Think beige, light grey, or even pastel shades
So I did some digging, and found some really great options under $100

Oroton denim dress $149 Material: 100 per cent cotton | Size range: 416 | Colour(s): blue | Sale price: 149 (was $279) Aere Neria Wool Blend Knit dress $123.2 Material: wool, recycled nylon and organic cotton blend | Size range: 616 | Colour(s): brown, grey | Sale price: $123.20 (was $160) Friends With Frank The Costance blazer $649 Material: wool and polyester blend | Size range: XXSXXL | Colour(s): black Karlaidlaw Kangaroo Pocket long-sleeve dress $270 Material: 100 per cent viscose | Size range: XSXXXL | Colour(s): cream, black Cos Merino Wool Buttoned Shift mini dress $159 Material: wool, cotton and polyester blend | Size range: XSL | Colour(s): taupe Elka Collective Marley knit dress $299 Material: viscose and polyester blend | Size range: 416 | Colour(s): black St Agni Tassel shift mini dress $719 Material: 100 per cent silk | Size range: XXSXL | Colour(s): black | Sale price: $719 (was $899) Viktoria & Woods Sanctuary silk dress $590 Material: 100 per cent silk | Size range: 414 | Colour(s): black Additional reporting by Alice Jeffery

Ruched Waist Detailing: Enhances the figure and adds texture
Making a comback this current season, a classic flat can effortlessly take you to the office and then for a cocktail, or for a stroller walk around the block