---
title: "One Long Sofa Seat Cushion or Three? Custom-Size Replacements"
url: "https://cushionguide.com/answers/replacement-sofa-cushions-custom-size/"
section: "The Cutting Table"
author: "Nate Kowalski, The Pattern Engineer of Detroit"
author_url: "https://cushionguide.com/masters/nate/"
published: "2026-03-08"
updated: "2026-09-24"
keywords: "replacement sofa cushions custom, custom couch cushions, one long sofa seat cushion, replacement couch seat cushions, wood frame couch cushions"
---

# Can you remake my sofa's seat cushions, or replace them with one long cushion?

*Yes to both. To a tape measure, a worn couch seat is a bench cushion with a backrest behind it, and it gets measured the same way.*

Also asked as: Can you replace my indoor couch cushions?; It's a wood-frame couch, not quite a bench.

> **The quick answer:** Replacement sofa seat and back cushions can be made to your exact measurements, with the thickness matched to the originals, and three seat cushions can become one long cushion with no seams across the seat. Send the length, width and thickness of each piece plus your fabric code, and ask for the shipping cost to be stated in the quote.

![Petrol teal corduroy bench cushion on a light oak slab bench against a charcoal wall with knit and silver pillows](https://cushionguide.com/media/bench-cushions/petrol-teal-corduroy-bench-pad-oak-bench-charcoal-wall-1536.webp "Teal cord bridges the dark wall and the pale oak, picking its color straight from the abstract canvas above.")

## Key facts

- Sofa seat and back cushions are remade from your measurements.
- Thickness is matched to the originals, such as 7 to 8 in (18 to 20 cm).
- One long cushion can replace three separate sofa seat cushions.
- One worn couch set had a 71 x 25 in (180 x 64 cm) seat plus a backrest.
- A quote needs length, width, thickness and a fabric code for each piece.
- Handmade sizes can vary by about 1/2 to 1 in (1 to 2.5 cm).

## A couch seat is measured like a bench

The workshop treats a sofa the way it treats a bench. Seat and back cushions are cut from your length, width and thickness, and the thickness copies the originals so the couch sits the way you remember it.

One question decides the rest, partner: three cushions or one? Buyers who dislike the two seams across a 3-seater often ask for one long seat, and it works well. The [replacement sofa seat cushions](https://cushionguide.com/guides/replacement-sofa-seat-cushions/) Pattern covers the tape work, the [bench cushion builder](https://cushionguide.com/studio/bench-cushion-builder/) previews a single long seat, and [one piece or two](https://cushionguide.com/guides/long-bench-cushion-one-piece-or-two/) covers where a split makes sense. What does your couch measure, arm to arm?

## A wood-frame couch, remade in mint

A buyer in the US wrote in about a wood-frame couch, not quite a bench, whose seat and back cushions had gone tired. The seat measured 71 x 25 in (180 x 64 cm). The new set was made to those numbers, backrest included, at 7 to 8 in (18 to 20 cm) thick to match the old cushions, in mint. The quote already included shipping.

## Three seat cushions or one long one

|   | Three separate cushions | One long cushion |
|---|---|---|
| Seams across the seat | Two, where the cushions meet | None |
| What you send | Each cushion's width, depth and thickness, with the total length divided equally | One length, one depth, one thickness |
| How it's made | Each size is its own piece, ordered separately | One piece, cut to the full length |
| Look | Like the original sofa | Clean, unbroken top |

Handmade sizes can vary by about 1/2 to 1 in, so flag any length that must not run over.

> **Tailor's margin:** Swapping three sofa seat cushions for one long cushion removes the two seams across the seat: send one length, one depth and one thickness.

> Replacement sofa cushions need three numbers: length, width and thickness, with the thickness matched to the old ones, like 7 to 8 in on one worn couch.
>
> — Nate

## Buyer questions

**A common question:** Could I swap my sofa's three seat cushions for one long bench-style cushion?

**The workshop's answer:** Yes. One long cushion in place of three gives a clean look with no seams and works well; plenty of buyers do it. Send the length, width and thickness plus your fabric code for a quote.

**A common question:** Can you remake my worn couch seat and back cushions to my own measurements?

**The workshop's answer:** Yes. One set was a 71 x 25 in (180 x 64 cm) seat plus a backrest, 7 to 8 in (18 to 20 cm) thick to match the originals, in mint, quoted with shipping included. A wood-frame couch is measured the same way as a bench.

**A common question:** Can several cushions sit flush side by side on one long seat?

**The workshop's answer:** Yes. Send each cushion's width, depth and thickness, dividing the total length into equal pieces. Each size is made as one piece, so order the sections separately, and go slightly smaller only if you want gaps.

**A common question:** How close to my numbers will the finished cushion be?

**The workshop's answer:** Sizes are made as written, not rounded, but a handmade cushion can vary by about 1/2 to 1 in. Piping adds slightly to the outer size, so say if your total must include it.

## Questions buyers ask next

### Can the back cushions be replaced too, or only the seat?

Both. Seat and back cushions are remade from your measurements, the same way as bench cushions. Give each back cushion its own length, height and thickness so the whole set is quoted together.

### What thickness should replacement couch cushions be?

Match what you have. Thickness is copied from the originals, like the 7 to 8 in (18 to 20 cm) of one worn couch set, so the seat height and the look stay familiar. Send the measured thickness with the length and width.

### Is shipping part of the replacement cushion quote?

On some quotes it has been: the mint set above was quoted with shipping included. The quote states what it covers, so send all three measurements and your fabric code together and read the quote before you pay.

## Related at the atelier

- [Can you make a cushion in a custom shape, like a trapezoid or my own sketch?](https://cushionguide.com/answers/custom-shape-cushion-trapezoid-sketch/): Yes, a custom shape cushion can be made from a hand sketch or example photo that shows every measurement; the workshop reviews it and replies with options.
- [How accurate is the finished size of a handmade cushion?](https://cushionguide.com/answers/custom-cushion-size-tolerance/): A custom cushion is cut to the exact size you give, not rounded, but a handmade foam cushion can still vary by about 1/2-1 in (1-2.5 cm), and a fully tufted one by 1-2 in (2.5-5 cm).
- [My size isn't in the dropdown. How do I order a custom size?](https://cushionguide.com/answers/order-custom-size-not-in-dropdown/): To order a custom size cushion not in the dropdown, choose the size range your measurements fall into and type your exact size in the Add Personalization box.
- [Custom Bench Cushion in Pale Gray: A Color Story on Low Oak](https://cushionguide.com/readings/pale-gray-cushions-low-oak-reading-sofa-linen/): Pale gray bench cushions look almost silver in a warm, sunny room, because warm light and cream walls shift a light gray more than most buyers expect.
- [Custom Bench Cushion as Three Velvet Pads: How to Measure It](https://cushionguide.com/readings/three-velvet-seat-pads-sage-rose-mink-oak-bench/): To measure a bench for separate seat pads, take the usable length at the front and back, subtract the gaps you want, and divide by the number of pads.
- [Custom Bench Cushion in Cinnamon Bouclé: A One-Cushion Makeover](https://cushionguide.com/readings/cinnamon-boucle-oak-breakfast-bench-cushion-tuscan/): A custom bench cushion can remake a breakfast nook when its color comes from something already in the room, such as a terracotta floor, and its box edge stops just inside the bench rails.
- [One long cushion or two? Splitting a long bench or window seat](https://cushionguide.com/guides/long-bench-cushion-one-piece-or-two/)
- [How to measure a bench for a custom cushion (the bench, not the old pad)](https://cushionguide.com/guides/how-to-measure-bench-for-cushion/)

*± 1/4 in — Nate*

---

Written by Nate Kowalski (https://cushionguide.com/masters/nate/) 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/answers/replacement-sofa-cushions-custom-size/