The most popular mattress size is the queen mattress — and for good reason. A queen size offers plenty of space for single sleepers, while still providing enough room for couples. A queen mattress also tends to be more budget-friendly than a king size, and it’s easier to fit in most bedrooms — win-win. If you’re on the hunt for the best queen mattress, there are some really great options out there, no matter your preferred mattress type or sleeping style.