---
title: "Floor Sofa Bed: Size, Firmness and Sheets for Guests"
url: "https://cushionguide.com/guides/floor-sofa-bed-size-firmness/"
section: "The Pattern Room"
author: "Hana Lindqvist, The Quiet Geometer of Seattle"
author_url: "https://cushionguide.com/masters/hana/"
published: "2026-08-18"
updated: "2026-09-24"
keywords: "floor sofa bed, floor sofa bed size, floor sofa for guests, floor cushion as mattress, modular floor sofa sleeper"
---

# Can you sleep on a floor sofa? Bed size, firmness and sheets

*A floor sofa is already most of a bed. You only need to know how it opens, what it measures, and what holds it together at night.*

> **The quick answer:** A modular floor sofa opens into a guest bed of about 79 x 79 in (200 x 200 cm), close to king size, when its two seat mattresses lie side by side. Each mattress is about 79 x 39 x 6 1/2 in, near a twin XL, so twin XL sheets fit. The medium-firm cold foam suits guests for several nights, even weeks.

![Periwinkle blue and rust striped corner floor cushion with backrest pillows in a plaster hallway on limestone tiles](https://cushionguide.com/media/corner-floor-cushions/periwinkle-rust-stripe-corner-floor-cushion-hallway-1600.webp "A two-tone stripe in lilac-blue and rust gives a stone-floored hallway a soft place to pause, with a peg rail and throw beside it.")

## A bed hiding in plain sight

Every modular floor sofa has a bed folded inside it. On the standard two-layer sofa, two seat mattresses, each about 79 x 39 x 6 1/2 in (200 x 100 x 17 cm), stack to make a seat about 14 in (36 cm) high. Lift one off, lay it beside the other, and you have a floor sofa bed of roughly 79 x 79 in (200 x 200 cm).

That is close to a US king. Each mattress alone is close to a twin XL. The workshop sometimes calls the pair a double. The tape measure says king.

As a floor sofa for guests, it has held visitors for weeks at a time. Who will sleep on yours, and for how many nights? Below is how to open it, dress it and keep it together, and where it stops being the right bed. The [modular floor sofas](https://cushionguide.com/cushions/modular-floor-sofas/) collection shows the shapes.

## Floor sofa bed size, piece by piece

| Piece | Flat size | Sleeps | Notes |
|---|---|---|---|
| Two seat mattresses, side by side | About 79 x 79 in (200 x 200 cm) | Two adults | Close to king; a twin XL sheet on each |
| One seat mattress | About 79 x 39 in (200 x 100 cm) | One adult | Close to a twin XL |
| Ottoman, opened | About 79 x 39 in (200 x 100 cm) | Extends the bed | Folds to 39 x 39 in (100 x 100 cm) |
| Corner sofa with ottoman | About 79 x 119 in (200 x 300 cm) | Two adults and two children | Larger than a king |
| Two tufted floor cushions, joined | Twin each, about 38 x 75 in (97 x 191 cm) | Two, as a double | Firm; tufted sizes vary 1 to 2 in |
| Child's sleepover cushion | 24 x 70 or 27 x 70 in (61 x 178 or 69 x 178 cm) | One child | Common under loft beds |

Handmade foam cushions can vary by about 1/2 to 1 in; fully tufted ones by 1 to 2 in.

## From sofa to bed, in eight moves

1. **Lift off the backrests**: The backrests and armrests are loose cushions resting against the metal bars. Set them aside. They are a little shallower than the seat mattresses, so they stay out of the sleeping surface.
2. **Lift the top mattress**: On the two-layer sofa, lift the upper seat mattress off the lower one. Each layer is about 39 in (100 cm) wide and 79 in (200 cm) long.
3. **Lay a rug or grip mat first**: On hardwood or tile, put a rug or an anti-slip mat where the bed will go. Lightweight foam on a smooth floor moves when you sit or turn. Leave a hand's width of floor between the bed and the wall, so the bedding has somewhere to fall.
4. **Push the mattresses together**: Long sides touching. The undersides carry non-slip fabric and the pieces are heavy, so side by side they mostly stay put. They don't attach to each other and there are no hook-and-loop connectors. If you want them fastened, ask before ordering: ties were offered once, and another reply said this model can't take them.
5. **Dress each mattress on its own**: A twin XL fitted sheet fits each 79 x 39 in mattress. Dressed separately, one sleeper turning over doesn't drag the other side's sheet. One wide blanket or duvet across both covers the join.
6. **Set the backrests at the head**: Stand the two L-shaped backrests, each about 39 x 39 x 15 in (100 x 100 x 38 cm), against the wall at the head end as a soft headboard, or stack them in a corner. Pillows lean on them instead of sliding off.
7. **Add the ottoman for a longer bed**: Unfold the ottoman's two layers into a 39 x 79 in (100 x 200 cm) strip and set it at the foot or the side. With it, the corner sofa lays out to about 79 x 119 in (200 x 300 cm).
8. **Make it a sofa again**: In the morning, restack the seat mattresses and set the backrests and armrests back against their bars. If creases show on new corduroy, steam them out now rather than later.

## Firmness: medium, and honest about it

The seat mattresses are high-density [cold foam](https://cushionguide.com/glossary/#cold-foam), most often quoted at 1.75 lb/ft³ (28 kg/m³) with an ILD of 42. Medium-hard. Not very hard. It keeps its shape for years and softens a little with use.

For sitting, that reads as relaxed. For sleeping, it reads as supportive without being squishy. That is what makes a modular floor sofa sleeper work for more than one night.

Fabric matters more at night than by day. [Corduroy](https://cushionguide.com/fabrics/corduroy/) is the standard. If the bed will be slept on often, the workshop suggests the smooth [linen-look performance weave](https://cushionguide.com/fabrics/linen-look-fabrics/) over linen. Covers zip off and wash at 86°F (30°C). Test your preference in the [foam firmness finder](https://cushionguide.com/studio/foam-firmness-finder/), or read [density versus firmness](https://cushionguide.com/guides/foam-density-vs-firmness-ild/).

## Tufted cushions, and where the floor bed stops

Tufted floor cushions are another way down to a floor bed. They are densely filled and firm enough to sleep on, which is why buyers ask about a floor cushion as mattress so often. A twin is about 38 x 75 in (97 x 191 cm), and two pushed together make a double. At 6 or 8 in (15 or 20 cm) thick they sit higher off the floor. See [tufted floor couch sizes](https://cushionguide.com/guides/tufted-floor-couch-set-sizes/) and [floor cushions](https://cushionguide.com/cushions/floor-cushions/).

Now the limits. The modular bed sits about 6 1/2 in off the floor, so getting up is a squat, not a step. Two separate mattresses leave a join down the middle. The modules are loose, so bare floors need grip. For a toddler's everyday bed, the workshop points to its separate kids' foam bed instead.

Nightly use is possible, and floor mattresses are made to any size and thickness. Choose knowing the height, the join and the fabric.

A sofa by day.
A bed by night.
The same foam, laid flat.

## A tiny house that needed a bed on the floor

A parent in the US wrote to the workshop about a tiny house on wheels. They wanted a floor sofa with no frame, about 77 in (196 cm) wide, no taller than 30 in (76 cm), that could open to 60 to 65 in (152 to 165 cm) for sleeping. Cotton, ideally.

The workshop suggested its modular corduroy sofa and sent the numbers first: 78 1/2 in (199 cm) wide, 29 in (74 cm) high, 39 in (99 cm) deep, with a 14 in (36 cm) seat. That is 1 1/2 in wider than the space described, and the family needed to see it on paper, in their own room, before choosing.

In a small space, height and opened length decide. Color comes after. See [tiny house and loft floor seating](https://cushionguide.com/concepts/tiny-house-and-loft-floor-seating/).

## Where floor beds go wrong

- ✗ A bare hardwood floor. Put a rug or grip mat under floor seating, and felt pads or fabric under metal bars so they don't slide or scratch.
- ✗ Bars left in the box. Use every connector bar supplied; in sofa mode the backrests and armrests depend on them.
- ✗ Add-ons typed into the size box. Ask for ties or a non-slip base in writing, message after ordering to confirm, and check the pre-dispatch photo.
- ✗ Making up the bed over fresh creases. Compressed-shipping creases in corduroy set if the sofa sits under a blanket for weeks; steam them out early.
- ✗ Ordering to the exact inch of a nook. Leave at least 2 in (5 cm) for handmade tolerance, and mark length and width on a photo of the space.

> **Tailor's margin:** Each floor sofa seat mattress is about 79 x 39 in, close to a twin XL, so a twin XL fitted sheet dresses one mattress at a time.

> Two floor sofa seat mattresses laid side by side make a bed of about 79 x 79 in, close to a US king, in medium-firm cold foam.
>
> — Hana

## Buyer questions

**A common question:** What size bed does the floor sofa make? Queen or king?

**The workshop's answer:** Each seat mattress is 39 x 79 in (100 x 200 cm), about a US twin XL. Side by side they make roughly 79 x 79 in (200 x 200 cm), close to king size, and suit a king-size tatami platform. The ottoman opens into a further 39 x 79 in, so the corner version lays out larger than a king, enough for two adults and two children.

**A common question:** Is a floor cushion really OK to sleep on, and what size should I get?

**The workshop's answer:** Yes. They're solid enough to sit or lie on, and many buyers use them for children's sleepovers. Under a loft bed, 24 x 70 or 27 x 70 in is typical; a twin is about 38 x 75 in; someone 5 ft 9 in was advised the 30 x 73 in tufted set. A 6 or 8 in thickness sits higher off the floor.

**A common question:** How big is the ottoman, and does it fold open?

**The workshop's answer:** It's 39 x 39 in (about 100 x 100 cm), one connected piece in the same foam as the sofa. Its two stacked layers open flat into a longer rectangle, like two pillows side by side. The layers can be made separate on request, and the main seat mattresses can be made as two folding pieces too.

**A common question:** Does the floor sofa come with the metal bars, and how many?

**The workshop's answer:** Yes. The bars hold the backrests and armrests, even though bed photos don't show them. A single sofa comes with 4, the L-shape with ottoman 6, and a full corner set needs 8 large and 8 small pieces. They may ship in a separate parcel with set-up instructions. If a piece is missing, send photos of what arrived.

**A common question:** How close to my ordered size will a handmade cushion be?

**The workshop's answer:** Sizes are cut exactly as written, not rounded, but handmade foam cushions can vary by about 1/2 to 1 in, and fully tufted ones by 1 to 2 in. Piping adds a little to the outer size, so say if the finished size must include it. A cushion that came out clearly short was remade.

## Before the guests arrive

### What sheets fit a floor sofa bed?

Twin XL sheets fit each seat mattress, since each is about 39 x 79 in. Dress the two mattresses separately, then lay one wide blanket or duvet across both to cover the join in the middle.

### Will the two mattresses drift apart at night?

Mostly they stay put. Non-slip fabric lines the undersides of the mattresses and the ottoman, and the pieces are heavy. They don't attach to each other and have no hook-and-loop connectors, so on bare floors add a rug or grip mat, and ask about ties before ordering.

### How firm is a floor sofa for sleeping?

Medium-hard: high-density cold foam most often quoted at 1.75 lb/ft³ (28 kg/m³) with an ILD of 42. It isn't very hard, keeps its shape without sagging, and softens slightly with use, comfortable for sitting by day and sleeping at night.

### Can a floor mattress be made to a custom bed size?

Yes. Floor cushions and floor mattresses are made to any length, width and thickness, including twin or full sizes 4 to 6 in thick, with or without backrest and armrests. On the teddy sofa the length can change, up to about 82 in, but the layer thickness can't.

## Related at the atelier

- [Is a floor sofa comfortable enough for guests to sleep on?](https://cushionguide.com/answers/floor-sofa-guest-bed-comfort/): Yes, a floor sofa is comfortable enough for guests to sleep on: laid flat, its two mattresses make a 79 x 79 in (200 x 200 cm), roughly king-size surface that two adults can share.
- [What size bed does the floor sofa make? Queen or king?](https://cushionguide.com/answers/floor-sofa-bed-size-king/): The floor sofa makes a bed of about 79 x 79 in (200 x 200 cm), roughly king size.
- [What bed size does the floor sofa make, and what sheets fit it?](https://cushionguide.com/answers/floor-sofa-bed-size-sheets/): Each floor sofa mattress is 39 x 79 in (about 100 x 200 cm), close to Twin XL, so Twin XL sheets fit each one.
- [How to raise floor sofa seat height, layer by layer](https://cushionguide.com/guides/floor-sofa-seat-height-raise/): A floor sofa seat sits about 13.5 to 14.5 in (34 to 37 cm) off the floor, and the simplest way to raise it is to add a layer.
- [Floor sofas for small apartments, sized to the wall you have](https://cushionguide.com/concepts/small-apartment-floor-sofa-layouts/): A floor sofa for a small apartment is sized from the wall with the other furniture already in place, then narrowed from the standard 78.7 in (200 cm).
- [Is a floor sofa right for you? Floor couch height, back support and space](https://cushionguide.com/guides/floor-sofa-buying-guide-height-space/): A floor sofa suits you if everyone who sits on it can get down to a seat about 14 in (36 cm) high and back up again, and your room has space for its footprint.
- [Corduroy modular floor sofas and cushions: wale size, nap direction, why no piping](https://cushionguide.com/guides/corduroy-cushions-wale-nap-direction/)

*— Hana*

---

Written by Hana Lindqvist (https://cushionguide.com/masters/hana/) for CushionGuide (https://cushionguide.com/about/). The site explains made-to-measure cushions and the partner workshop makes them; measurements are in inches first. This Markdown mirrors the page at https://cushionguide.com/guides/floor-sofa-bed-size-firmness/