This tends to make a queen size mattress an improved selection When your place will not be so roomy. Hence, Singapore standard king size mattress is 72in by 75in (180cm by 190cm). Though the queen size is 60in by 75in (150cm by 190cm). A handful of variants into the queen https://www.sleepspace.com.sg/blogs/news/mattress-sizes-in-singapore-the-definitive-dimensions-guide