This tends to make a queen size mattress a greater choice Should your room just isn't so roomy. For that reason, Singapore standard king size mattress is 72in by 75in (180cm by 190cm). When the queen size is 60in by 75in (150cm by 190cm). Some variants into the queen size https://www.sleepspace.com.sg/blogs/news/mattress-sizes-in-singapore-the-definitive-dimensions-guide