12 vs 14 Inch Mattress: What Those Extra Two Inches Really Buy You
Novilla Bliss Queen Size Mattress
Worth it, if you know what you're buying it for
- you sleep hot and want foam that actually manages heat
- you share a bed and want movement absorbed rather than felt
- you want reinforced edges you can sit or sleep near without rolling off
Full XL Mattress
Worth it, if you've got the right room or the right height
- you're taller than average and keep outgrowing standard full beds
- you're furnishing a narrow room, dorm, or RV where a queen won't fit
- you sleep hot and want foam comfort without the trapped heat
By the numbers: both score 4/5 on our verdict scale — the split here is audience, not quality. Full dataset.
12 vs 14 Inch Mattress
You're scrolling mattress listings and the only thing separating two options is a number: 12 vs 14 inch mattress, like the taller one is just the better one. Here's what I'd want to know first: those inches aren't padding for padding's sake. They're built differently, and that difference decides whether you sink into foam or bounce a little on springs, whether the mattress fits your room, and whether it fits you. The height is a clue, not the answer.
A 12 inch mattress like the Novilla Bliss gets its height entirely from stacked foam: gel foam on top for heat, denser support foam underneath for your spine, reinforced foam at the edges so you don't roll off when you sit down to put your socks on. Every layer is foam, which is why it isolates motion so well. Your partner turns over, you barely feel it.
A 14 inch mattress like the bellable Full XL gets its extra two inches a different way: foam on top, but pocket springs underneath instead of more foam. This is the bit the listing buries. Those two inches aren't just more cushioning, they're a whole different support mechanism. Springs give you some bounce back and a bit more legroom off the floor, which matters if you're tall or the mattress is going into a dorm, RV, or a narrow room where a queen won't fit. What you lose is that dense, slab-like edge, the pocket spring border gives a little more than a foam-encased one.
So taller isn't better. Taller is different: springs versus foam, bounce versus hush.
Choose the 12 inch mattress if
- You sleep hot and want gel foam that actually manages it
- You share a bed and want your partner's movement absorbed, not felt
- You want a firm, reinforced edge you can sit or sleep near without rolling off
- You're fine giving it the full 72 hours to expand before you judge the feel
Choose the 14 inch mattress if
- You're taller than average and keep outgrowing a standard full bed
- You're furnishing a dorm, RV, or a narrow room where a queen won't fit
- You want some spring bounce under the foam, not a solid slab feel
- You don't mind a softer edge than a dense foam-encased border gives
Neither height wins outright, and honestly, that's the whole trick of this comparison. The 12 inch foam build is the one to trust if you run hot, share a bed, and want an edge sturdy enough to perch on. The 14 inch hybrid earns its extra two inches if you need the legroom, you're working with a tight room, or you like a bit of give back from the mattress rather than a hush. Pick based on the problem you actually have, not the bigger number.
Before you go
Is 14 inches a deep mattress?
Yes, 14 inches sits toward the deep end, and in this case that height comes from an added pocket spring layer, not just thicker foam.
Is 12 inches a good height for a mattress?
Yes, 12 inches is a standard all-foam build, tall enough for real pressure relief and support without needing extra height to do the job.
Full verdicts: Novilla Bliss Queen Size Mattress · Full XL Mattress