https://handmadestories.com.au/blogs/news/quilt-cover-sizes-australia

A king single quilt cover is designed to fit a larger single bed, offering extra width and length for comfort. Its standard size typically measures around 150 × 210 cm in Australia, 107 × 203 cm in the USA (Twin XL), and may vary slightly in other regions depending on the brand. This size is ideal for single sleepers who want more space or for taller individuals needing extra coverage.