---
title: "Bay Window Seat Cushion: How to Order an Angled Shape"
url: "https://cushionguide.com/answers/bay-window-seat-cushion-angled-order/"
section: "The Cutting Table"
author: "Nate Kowalski, The Pattern Engineer of Detroit"
author_url: "https://cushionguide.com/masters/nate/"
published: "2026-06-01"
updated: "2026-06-01"
keywords: "bay window seat cushion, angled bay window cushion, three sided bay window seat cushion, custom trapezoid bay cushion, asymmetric bay window cushion"
---

# How do I order a cushion for an angled bay window seat?

*A bay seat is a rectangle that took a detour at both ends. The order form cares about two numbers; your drawing carries the rest.*

Also asked as: Cushion for a bay window seat with angled ends; Three-sided bay window, the bench is a trapezoid

> **The quick answer:** Order an angled bay window seat cushion on the trapezoid (custom-shape) listing, not the rectangle one, choosing the size by the seat's depth and overall length. Then upload a drawing with every edge, any cut-ins and the depth, plus a photo of the seat; a hand sketch on paper is fine. Asymmetric bays are cut to your drawing.

![Three-piece bay window seat cushions in navy floral print with pale blue and ivory pillows, waffle throw and linen blinds](https://cushionguide.com/media/bay-window-cushions/three-piece-navy-floral-bay-window-cushion-set-1600.webp "A bay window seat split into three cushions, each cut to its own wall, in one navy floral with self piping.")

## Key facts

- Angled and three-sided bay window cushions are ordered on the trapezoid (custom-shape) listing.
- The size is selected by the depth and the overall length.
- Upload a drawing with every edge, cut-ins and depth, plus a photo of the seat.
- A simple hand sketch on paper is enough.
- Asymmetric bays can be sketched or traced onto a paper template.
- The workshop may ask for a few extra measurements before quoting.
- An angled shape ordered on the rectangle listing is canceled and refunded so you can reorder.
- Bay seat cushions are cut from 32-density foam (about 2.0 lb/ft3), 4 in thick as standard; 3 in gives a lower, neater profile.
- A handmade shaped cushion can differ from the drawing by about 0.5-1 in, so mark every edge as measured, without subtracting anything.

## Which route fits your bay

| Your seat | Route | What to upload |
|---|---|---|
| Three-sided (canted) bay | Trapezoid listing, sized by depth and overall length | Drawing with every edge and the depth, plus a photo |
| Trapezoid with extra points or cut-ins | Trapezoid listing, same size rule | Every edge, each cut-in, the depth |
| Asymmetric bay | Trapezoid listing or a traced paper template | Outline with every side measured, or the template |
| Irregular edge, such as wood sticking out | Same custom-shape route | Photo and drawing that show the obstruction |
| Truly unusual shape | The tailor prices your drawing | Every measurement marked; a custom order link comes back |

## Ordering it, in five moves

1. **Measure depth and overall length**: These two numbers pick the size on the trapezoid listing.
2. **Draw every edge**: Long side, short side, both angled sides, any cut-ins, and the depth. Pencil on paper is fine.
3. **Photograph the seat**: One clear photo of the bay, straight on.
4. **Upload both at checkout**: Use the Add Personalization section. If it takes one image, upload the drawing and send the rest by message.
5. **Answer the follow-up**: The workshop may ask for a few more measurements before quoting. Better a question now than a recut later.

## Why the rectangle listing won't do

Angles are just lengths in disguise, partner, and the rectangle listing has nowhere to put them. Order an angled bay there and the workshop cancels and refunds it so you can reorder on the right listing. No harm done, just a second order.

On the trapezoid listing the form takes depth and overall length; your drawing supplies the angled sides. If your bay is lopsided, trace the seat onto paper. The [bay window calculator](https://cushionguide.com/studio/bay-window-calculator/) checks your numbers, the [three-sided bay Pattern](https://cushionguide.com/guides/bay-window-seat-cushion-3-sided/) covers the measuring, and the [paper template Pattern](https://cushionguide.com/guides/paper-template-for-custom-cushion/) covers the tracing. More shapes live under [bay window cushions](https://cushionguide.com/cushions/bay-window-cushions/). How many edges does your bay have?

> **Tailor's margin:** An angled bay window cushion goes on the trapezoid listing, sized by depth and overall length, with a drawing of every edge uploaded at checkout.

> Long side, short side, two angled sides and the depth: those five numbers on a paper sketch, plus a photo, are what a three-sided bay cushion is cut from.
>
> — Nate

## Buyer questions

**A common question:** Can you make a cushion for a three-sided bay window seat that isn't a rectangle?

**The workshop's answer:** Yes. Angled bay seats go through the custom trapezoid listing: upload a photo and a drawing with measurements, and the cushion is shaped to it. Benches with wood sticking out or other irregular edges are handled the same way.

**A common question:** My bay window seat has angled ends. Which listing do I use?

**The workshop's answer:** The trapezoid listing, not the rectangle one. In Add Personalization, upload a drawing with every edge measured plus a photo of the seat; a hand sketch is fine. An angled shape ordered on the rectangle listing is canceled and refunded so you can reorder.

**A common question:** Can you do a trapezoid variation with extra points for my bay?

**The workshop's answer:** Yes, those are exactly the custom shapes the workshop makes. Order on the trapezoid listing using the depth and overall length for the size, and upload the pictures with measurements at checkout.

**A common question:** My bay seat isn't a rectangle and isn't symmetrical either. Can you still make it?

**The workshop's answer:** Yes. Draw the seat outline on paper with every side measured and send a photo, or trace the seat onto a paper template. The workshop may ask for a few extra measurements before quoting.

**A common question:** Can you price a trapezoid bay cushion straight from my drawing?

**The workshop's answer:** Yes. Send every edge length (long side, short side, angled sides), any cut-ins and the depth, drawn on paper. The tailor works out the price from the drawing and sends a custom order link.

## Questions buyers ask next

### What if I already ordered my angled bay cushion as a rectangle?

Message the workshop. An angled shape ordered on the rectangle listing is canceled and refunded, and you reorder on the trapezoid listing with your drawing and a photo of the seat attached.

### Sketch or traced template for a lopsided bay seat?

Either works. A measured sketch of the outline is the simplest route, and tracing the seat onto paper suits a bay where no two sides match. Send a photo of the seat with whichever you choose.

### Can my drawing show a post or trim that sticks out?

Yes. Benches with wood sticking out or other irregular edges are handled like any custom shape. Mark the obstruction on the drawing with its size and position, and add a photo of it.

## Related at the atelier

- [Bay Window Cushion in Mustard: 5 Mistakes This Photo Avoids](https://cushionguide.com/readings/mustard-trapezoid-bay-seat-terracotta-piping-arched-windows/): A bay window cushion fits when it is cut as a true trapezoid: a long front, a shorter back against the wall, and two angled ends measured one at a time.
- [Bay Window Cushion Set in Navy Floral, Cut in Three Pieces](https://cushionguide.com/readings/three-piece-navy-floral-bay-window-cushion-set/): A three-sided bay window cushion works best as three pieces: a center rectangle and two end pieces cut to each wall's angle, with the joins under the mullions.
- [Bay Window Cushion in Olive Gold Velvet: The Daily-Life Test](https://cushionguide.com/readings/olive-gold-velvet-trapezoid-dining-bay-seat/): A velvet bay window cushion beside a dining table ages well when it is specified for daily loads.
- [Can you make a cushion for a bay window with 5 windows, all at different angles?](https://cushionguide.com/answers/multi-angle-bay-window-cushion-5-windows/): Yes: a bay window seat cushion can have any number of angles, including 5-window, pentagon and hexagon bays.
- [My window seat has lift-up lids. Should the cushion be split?](https://cushionguide.com/answers/storage-bench-lift-up-lid-cushion-sections/): Yes: split a storage bench cushion at the lid lines, so each section lifts with its own lid; three lids get three cushions.
- [How do I label the sides on my trapezoid cushion drawing?](https://cushionguide.com/answers/trapezoid-cushion-drawing-label-sides/): Give every edge of the trapezoid a letter and a length: A, B, C and D for the four sides, plus E and F for clipped corners or end pieces, then add the depth and thickness.
- [Measuring a 3-sided bay window seat cushion, panel by panel](https://cushionguide.com/guides/bay-window-seat-cushion-3-sided/)
- [5-sided bay window cushions: working out angles, sections and seams](https://cushionguide.com/guides/5-sided-bay-window-cushion-calculator/)

*± 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/bay-window-seat-cushion-angled-order/