---
title: "Corner Floor Cushions: Quarter-Circle Sizes, Fill and Fabric"
url: "https://cushionguide.com/cushions/corner-floor-cushions/"
section: "The Cushion Atlas"
author: "Harlan Pruitt, The Elder of High Point"
author_url: "https://cushionguide.com/masters/harlan/"
published: "2026-02-13"
updated: "2026-09-24"
keywords: "corner floor cushion, quarter circle floor cushion, corner nook cushion, kids corner floor cushion, reading corner cushion, corner floor pouf"
---

# Corner floor cushions, measured along the two walls

*A corner is the one spot in a room nobody knows what to do with, until a child climbs into it with a book. Here is how to size, fill and dress the quarter-round cushion that belongs there.*

> **The quick answer:** A corner floor cushion is sized by its two straight sides, the ones that run along the walls from the back corner, never by the curve or the diagonal. The default is 34 x 34 in and the standard maximum is 48 in per side. Tufted corners are 4 in thick, with 5 or 6 in on request; foam kids' corners are 8 in (20 cm).

![Teal and green leaf-print corner floor cushion with two backrest pillows against knotty pine paneling by a window](https://cushionguide.com/media/corner-floor-cushions/teal-leaf-print-corner-floor-cushion-knotty-pine-nook-1600.webp "Fern-like leaves in teal and moss green brighten a pine-clad corner, with a rust-striped rug and a small olive tree.")

## What a corner floor cushion is, and who sits in it

Forty-eight inches along each wall and about 75.4 in around the front curve: that is the largest quarter-round corner cushion the workshop makes as standard, and it fills a corner the way water fills a bowl.

A corner floor cushion is a quarter circle of seat for a 90-degree corner. Two straight sides go against the walls; one rounded edge faces the room. Most in the photographs live in children's rooms under a canopy, heaped with star and cloud pillows. Others sit in a knotty pine nook by a window, or at the end of a plaster hallway with two backrest pillows against the walls.

They suit a story corner for small children, a [reading nook](https://cushionguide.com/cushions/reading-nook-cushions/), or a grown-up who likes to sit low with a cup of coffee. The two questions buyers ask most about them: how to measure one, and whether it comes in a size between the standard sizes. For square and round seats on the floor, see [floor cushions and floor seating](https://cushionguide.com/cushions/floor-cushions/).

## Standard sizes, and how to measure the corner

|   |   |
|---|---|
| How it is sized | By the two straight sides that meet at the 90-degree corner. 39 x 39 in means 39 in along each wall |
| Do not measure | The diagonal from the back corner to the front, or the curved front edge |
| Default size | 34 x 34 in (86 x 86 cm) |
| Common sizes | 32 x 32 in (80 x 80 cm), 39 x 39 in (100 x 100 cm), 40 x 40 in (102 x 102 cm), 48 x 48 in (122 x 122 cm) |
| Standard maximum | 48 in (122 cm) per side; the front curve is then about 75.4 in (191.5 cm) |
| Smaller | Down to 25 x 25 in (64 x 64 cm), made to order |
| In-between sizes | Choose the next standard size up and write your exact size in the note; you pay the price of the size you selected |
| Thickness | Tufted: 4 in (10 cm) default, 5 or 6 in on request. Foam kids' corner: 8 in (20 cm) |
| Triangle version | 32 x 32 in means the two sides that form the right angle |
| Three-sided corners | Send a photo and measurements with the depth taken in the middle; cut specially and quoted separately |

## Quarter circle, triangle or half circle

The quarter circle is cut from a fixed pattern, and that is a mercy: the curve comes out true every time. It also means the curve is hard to reshape. If your corner wants a different arc, draw it and give every measurement: the straight line across the curve, the distance from the middle of the curve back to the corner, and both straight sides. [Measuring a curved cushion](https://cushionguide.com/guides/curved-cushion-chord-rise-radius/) shows where each number goes.

Put two quarter circles side by side against a flat wall and you have a half circle. That is the workshop's answer when someone wants a corner bigger than 48 in: two cushions, not one giant one.

The tufted corner comes with buttons, and it can be made without them. Ruffles are not made. What the workshop can do is a double layer in two fabrics and two colors, which gives a soft, finished edge without a frill to crush.

## Fabrics for a corner that gets climbed on

Look through the photographs and you will see mostly [corduroy](https://cushionguide.com/fabrics/corduroy/): slate, sage, chocolate, navy, dusty pink, teal. Corduroy has a nap, a direction to its pile, so it shades lighter or darker as the light and the hand cross it. In a child's corner it is warm to the touch.

[Velvet](https://cushionguide.com/fabrics/velvet/) is the richer choice. Velvet remembers; it keeps the track of every palm that smooths it, and some of us love it for that. Know one limit, though: velvet rolls are narrower than the workshop's soft fabric roll of about 55 in (140 cm), so the very largest one-piece corners are cut in soft fabric.

For a grown-up nook, an oatmeal [linen-look weave](https://cushionguide.com/fabrics/linen-look-fabrics/) or a charcoal-and-white [stripe](https://cushionguide.com/fabrics/striped-cotton-and-ticking/) reads more like furniture than a nursery.

## Fill and thickness: fiber for tufted, foam for kids

Two kinds of corner cushion leave the workshop, and they are built differently inside.

The tufted corner has no foam core. It is packed tight with siliconized polyester fiber balls and deliberately overfilled, so it stays firm and does not press flat. It comes 4 in (10 cm) thick. Ask for 5 or 6 in if grown-ups will sit there too; a set of three once went out at 6.5 in.

The kids' corner floor sofa is foam-filled, 8 in (20 cm) thick, with a removable cover, and its best seller is the 39 x 39 in (100 x 100 cm). Each step up in size or thickness costs more, because every step is more fill and more fabric. [Floor cushion thickness](https://cushionguide.com/guides/floor-cushion-thickness-guide/) walks through how deep is deep enough.

## Two little girls and a 46-inch corner

A parent in the US asked the workshop about a reading corner for two little girls. The walls gave 46 in on each side, and the deciding question was thickness: the default 4 in, or something deeper.

The workshop quoted 5 in and 6 in, and sent photographs of cream, beige and smoke fabric side by side, because a screen flatters every gray. The parent chose smoke at 5 in. One inch over standard, for comfort when a grown-up folds down beside them for the bedtime chapter.

## Mistakes we see at the corner

- ✗ Measuring diagonally from the back corner to the front. The size is the two wall sides.
- ✗ Measuring the curve. A 48 in corner has a front arc of about 75.4 in, and that number is not its size.
- ✗ Planning the room around a 56 in corner. The standard maximum is 48 in per side; one couple in the US settled on 48 in, and two cushions can make a half circle.
- ✗ Describing a custom curve in numbers alone. Draw it, with the chord, the depth and both straight sides.
- ✗ Adding backrests or a second cushion months later. Each roll is dyed in its own batch, so order the whole set at once, or send a photo of the original for a batch match.
- ✗ Expecting the canopy from the photographs. It is styling; the cushion comes on its own.
- ✗ Leaving it late for a room reveal. Give a custom corner at least two to three weeks.

> A corner floor cushion is sized by the two sides along the walls, not by the curve. A 48 in corner measures about 75.4 in around the front.
>
> — Harlan

## Dressing the corner, and tools before you order

Dress the corner in layers, the way the photographs do. Two backrest pillows against the walls, then small shapes in front: a star, a cloud, a flower. A round jute rug under the curve softens the floor line, and a canopy overhead turns the corner into a room of its own.

Backrests can be made in the same fabric and color, one along a wall or one on each side. For a set with backs, the workshop checks that your numbers are wall sizes and asks for the height from the floor to the top of the backrest.

Who will the corner hold, my friend: one reader or two? Measure both walls, then read [quarter-circle corner sizes explained](https://cushionguide.com/guides/corner-floor-cushion-quarter-circle-size/). Try seat feel in the [foam firmness finder](https://cushionguide.com/studio/foam-firmness-finder/), see real layouts in [quarter-round corner cushions for reading nooks](https://cushionguide.com/concepts/corner-reading-nook-floor-cushions/), and before adding to an old set, read [dye lots and matching later](https://cushionguide.com/guides/dye-lots-matching-cushions-later/). For a whole room of small sitters, [kids' room and nursery cushions](https://cushionguide.com/cushions/kids-room-cushions/) is next door.

> **Tailor's margin:** Measure a corner floor cushion along each wall from the back corner, never across the diagonal and never around the curve.

## Buyer questions

**A common question:** How do I measure for a corner floor cushion? Along the walls or across?

**The workshop's answer:** Along the walls. The size is the two straight sides that meet at the 90-degree corner, so 39 x 39 in means 39 in down each wall. Measure from the back corner to where you want the cushion to end. Don't measure diagonally, and skip the curve and the long front edge. If your corner has three sides, like a corner window, send a photo with measurements and the depth taken in the middle; that shape is cut specially and quoted separately.

**A common question:** My corner needs something between your sizes. Can you make 35 x 35 in?

**The workshop's answer:** Yes. Choose the next standard size up, 39 x 39 in in that case, and write your exact size in the note. The price stays at the size you picked, because a custom size is extra work, not less. Smaller corners down to 25 x 25 in, a rectangular version and a taller cushion to match an ottoman have all been made. Message the workshop after ordering so it can confirm the size.

**A common question:** Is it really a quarter circle? Could two of them make a half circle?

**The workshop's answer:** It is a quarter circle, and the listed size is the length of each straight edge, not the curve. Two corner cushions placed side by side against a flat wall make a half circle. Send a photo of the space and the workshop will confirm it works. It can also send photos of colors side by side if you are torn between shades.

**A common question:** What size corner cushion do two toddlers need, and can it be thicker?

**The workshop's answer:** For two children around 3 years old, the workshop suggested 40 x 40 in. The tufted corner is 4 in thick as standard and can be made 5 or 6 in; the plush corner and the kids' corner floor sofa are 8 in (20 cm) thick. Price rises with each step in size and thickness, and larger or thicker pieces are quoted individually.

**A common question:** Can you add back cushions to a corner floor cushion?

**The workshop's answer:** Yes, in the same fabric and color. A 38 x 38 in (97 x 97 cm) corner has had one 38 x 16 x 4 in (97 x 40 x 10 cm) backrest along one side, and a 34 x 34 in corner was made with two. Order with the custom option and the set is quoted together.

## Questions from the corner

### What is the biggest corner floor cushion you can make?

The standard maximum is 48 in per side, which gives a front curve of about 75.4 in. For a larger footprint against a flat wall, two quarter-round cushions side by side form a half circle. Very large requests are looked at case by case with measurements and a photo.

### Does the canopy in the pictures come with the corner cushion?

No. The canopy in the photographs is styling, and the cushion is sold on its own. Pillows styled in listing photos are decorative and sold separately, unless the listing is a floor-cushion or French set that includes its backrest and bolsters.

### How do I order a corner shape that isn't a true quarter circle?

Send a drawing with every measurement before you order: both straight sides, the straight line across the curve and the distance from the middle of the curve to the corner. A few room photos taken from a distance help. The workshop tells you up front if a customization fee applies.

### Is a tufted corner cushion filled with foam?

No. Tufted floor cushions have no foam core. They are packed tightly with siliconized polyester fiber balls and deliberately overfilled, so they stay firm instead of pressing flat. The foam-filled option is the kids' corner floor sofa, 8 in (20 cm) thick with a removable cover.

### How far ahead should I order for a room makeover date?

Ask the workshop for current production and delivery times in writing, my friend, and leave yourself a margin. One interior designer in the US, installing a child's bedroom just before the holidays, asked for a rush, and the workshop committed to delivery within 15 days of the order.

### Square or quarter circle: which corner cushion suits a reading nook?

A quarter circle fills the corner and leaves a soft curved front edge, sized by its two straight sides along the walls. A square is the simplest shape, sold widely in 24 to 40 in sizes, and gives more room to sprawl but reaches further into the room. Tape each outline on the floor first to see which fits the room and the door swing.

## Related at the atelier

- [Corner Floor Cushion in Charcoal Stripe for a Paneled Room](https://cushionguide.com/readings/charcoal-white-stripe-corner-floor-cushion-panelled-wall/): A charcoal and white stripe corner floor cushion suits a white paneled room because the stripe repeats the vertical boards while staying clearly different from them.
- [Corner Floor Cushion in Olive and Mustard: Hand-Finished Details](https://cushionguide.com/readings/olive-seat-mustard-backrest-floor-cushion-photo-gallery/): A corner floor cushion looks hand-finished when its piping runs straight around the seat, its corners are filled out square and its backrest pillows keep a crisp flange.
- [Is the corner floor cushion a quarter circle, and what does the size measure?](https://cushionguide.com/answers/corner-floor-cushion-quarter-circle-size/): The corner floor cushion is a quarter circle, and its listed size is the length of the two straight edges, the radius, not the curved front.
- [How do you measure for a corner floor cushion?](https://cushionguide.com/answers/corner-floor-cushion-measurements-wall-sides/): A corner floor cushion is measured by its two straight sides, the ones that sit against the walls and meet at the 90-degree corner.
- [Floor cushion thickness: how thick before you stop feeling the floor](https://cushionguide.com/guides/floor-cushion-thickness-guide/): For most floor seating, choose 4 to 6 in: a tufted floor cushion is about 4 in (10 cm) as standard and a floor-seating seat about 6 in (15 cm).
- [Balcony corners: bench cushions for the smallest outdoor rooms](https://cushionguide.com/concepts/balcony-corner-bench-cushions/): A balcony bench cushion needs outdoor fabric wherever rain can reach it; indoor linen or velvet works only under a closed roof with no rain or direct sun.
- [Floor seating for real evenings: cushions, corner seats and low sofas](https://cushionguide.com/guides/floor-seating-ideas/)

*Sit well. — Harlan*

---

Written by Harlan Pruitt (https://cushionguide.com/masters/harlan/) 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/cushions/corner-floor-cushions/