A medium firm mattress suits most people. It’s a great all-rounder that works well if you’re not too fussed on super soft or super firm and want a balance of comfort and support.
Yes, it’s often recommended. A medium firm feel can help keep your spine aligned while still giving a bit of cushioning, which works well for a lot of sleepers.
It works well for back sleepers and is also a good option for side sleepers who want a bit more support. If you move around a lot during the night, it’s a solid middle ground.
Firmness is a personal thing. If you sleep on your side, a softer mattress usually feels better. If you’re on your back or stomach, something medium to firm tends to give better support.
That depends on your space and how much room you want. Singles are great for one person, while queen or king sizes give you a bit more room to spread out, especially if you’re sharing.
Side sleepers usually need a softer feel to take pressure off the shoulders and hips. Back sleepers are better off with a medium-firm mattress for support, and stomach sleepers generally need something firmer to keep the spine aligned.