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

A single quilt cover is designed to fit a standard single or twin-size quilt and typically measures around 135 × 200 cm in the UK, 140 × 210 cm in Australia, 173 × 218 cm in the USA (Twin), and approximately 150 × 240 cm in Pakistan, depending on the brand. Since sizes can vary slightly between manufacturers and regions, it’s always best to check your quilt’s exact dimensions before purchasing to ensure a perfect fit.