---
title: "Craftsman Window Seat Cushions for Bungalow Bays, Measured Right"
url: "https://cushionguide.com/concepts/craftsman-bungalow-window-seat-cushions/"
section: "Concept Sketches"
author: "Nate Kowalski, The Pattern Engineer of Detroit"
author_url: "https://cushionguide.com/masters/nate/"
published: "2026-01-19"
updated: "2026-09-24"
keywords: "craftsman window seat cushion, bungalow bay window cushion, trapezoid window seat cushion, angled window seat cushion, bay window seat measurements, window seat straight returns"
---

# Craftsman window seat cushions for shallow bays and short returns

*Bungalow builders tucked a short straight return into each end of their bays. Those little edges get forgotten, and they decide whether a cushion fits or comes back with points.*

> **The quick answer:** A craftsman window seat cushion is usually a clipped trapezoid: a long front edge, a shorter back edge, and a short straight return at each end before the angled sides begin. Measure all of them plus the straight depth, then check that the numbers close. If a measured slant misses the calculated one by more than about 1 in (2.5 cm), re-measure before cutting.

![Black and cream ticking stripe angled bench cushion on an oak storage bench with black, oatmeal and cognac pillows](https://cushionguide.com/media/trapezoid-cushions/black-ticking-stripe-angled-bench-cushion-oak-1600.webp "Ticking stripes and black hardware give a light oak bench a graphic edge; the cognac lumbar warms it.")

## Two small edges that decide the whole cushion

A 2 in (5 cm) straight return can move an angled side by more than an inch.

Craftsman bungalows, built roughly 1905 to 1930, put the seating into the house: shallow bays, window seats between bookcases, benches by the hearth. The bays tend to end in a short straight return before the angle starts, which turns a plain trapezoid into a clipped one. A craftsman window seat cushion is only as right as those two small edges.

The habit: measure front, back, straight depth, both returns and both slants, then draw it to scale. If the numbers cannot close into a shape, one of them is wrong. Angles are just lengths in disguise.

Check your own bay in the [bay window calculator](https://cushionguide.com/studio/bay-window-calculator/), with the [trapezoid measuring pattern](https://cushionguide.com/guides/trapezoid-cushion-measurements/) beside it. What does your return measure, partner?

## Eight bungalow bays, drawn to scale and checked

### 01. The cushion that came back with pointed ends

![Light gray linen-look angled bay window cushion with olive green piping on an oak drawer base beside a jute rug](https://cushionguide.com/media/trapezoid-cushions/light-gray-angled-bay-cushion-olive-piping-oak-1600.webp "A long taper runs from the wide back to a sharp tip at the side window, a shape only a template can capture. The olive welt echoes the ivy beyond the glass.")

A buyer's first cushion arrived too long, with pointed ends where the bay had square returns. Redrawn: 90 in (229 cm) bottom, 52 in (132 cm) top, 27 in (69 cm) deep, 6 in (15 cm) straight ends. Those returns force slants of about 28 in (71 cm), not the 24 in (61 cm) on the note.

**The takeaway:** Draw the straight returns first; the slants follow from them.

> **Tailor's margin:** A bay cushion drawn without its straight ends comes back with pointed corners. Draw the returns before the slants.

### 02. 32.5 in on paper, 31 in on the tape

![Oatmeal linen trapezoid cushion with blush pink piping on a white bay window bench with brass pulls, garden and fence beyond](https://cushionguide.com/media/bay-window-cushions/oatmeal-trapezoid-bay-window-cushion-pink-piping-1600.webp "Angled ends follow the bay walls, and a fine pink piping lifts an otherwise plain oatmeal linen.")

A buyer in the US sent 86.5 in (220 cm) bottom, 39.5 in (100 cm) top, 24.5 in (62 cm) deep, 2 in (5 cm) ends and 31 in (79 cm) slants. Our check said about 32.5 in (83 cm). The buyer re-measured: top just under 40 in, slants really 32.5 in. Made 4 in (10 cm) thick.

**The takeaway:** When slants disagree, re-measure the short edge too, not only the slant you doubt.

> **Tailor's margin:** A gap of more than 1 in between measured and calculated slant means a number needs re-measuring before cutting.

### 03. Six-inch cut-ins belong on the paper

![Forest green linen-look angled window seat cushion with copper piping, ivory pillows and a ticking lumbar on white cabinets](https://cushionguide.com/media/trapezoid-cushions/forest-green-angled-window-seat-copper-welt-1600.webp "Copper piping on deep green recalls classic library upholstery and matches the brass hardware below.")

One bay: 105.5 in (268 cm) long side, 51 in (130 cm) short side, 30 in (76 cm) angled sides, 21 in (53 cm) deep, 6 in (15 cm) cut-ins. The tailor cuts from the sketch, so every cut-in went on the drawing.

**The takeaway:** An edge that is not drawn and labeled is a missing edge.

> **Tailor's margin:** The tailor cuts from the sketch, so a 6 in cut-in belongs on the drawing, not only in the email.

### 04. Where the window frame sticks out

![Heathered gray window seat cushion with ochre piping, angled end backrests and gray pillows under a double-hung window](https://cushionguide.com/media/window-seat-cushions/heather-gray-window-seat-ochre-piping-angled-backs-1600.webp "Angled backs at both ends and ochre piping make this a proper place to curl up with a book by the window.")

Here the window frame sides stuck out into the seat. Edges of 103 in (262 cm) and 73 in (185 cm), depth corrected from 19.25 in to 19 in (48 cm). With the short returns drawn in, the angled sides came to about 24 in (61 cm), not 21.5 in (55 cm).

**The takeaway:** Treat frame and trim projections as edges of their own.

> **Tailor's margin:** Short straight returns moved one bay's angled sides from 21.5 in to about 24 in. Draw every return.

### 05. The 40 in sides that could not exist

![Dusty rose linen-look bay window seat cushion with chocolate piping and a draped cardigan in a white paneled dressing room](https://cushionguide.com/media/bay-window-cushions/dusty-rose-bay-seat-cushion-dressing-room-1600.webp "Dusty rose with chocolate piping softens a dressing room bay, cut to follow the angle of the window.")

An angled seat with two center buttons came in with 40 in (102 cm) angled sides. Drawn to scale, 40 in would not close; the shape worked only at 34 in (86 cm), and a re-measure confirmed it.

**The takeaway:** Have a second person hold the tape and read each re-measured edge back.

> **Tailor's margin:** A seat's 40 in angled sides would not close on paper; 34 in did, and the tape agreed.

### 06. A good sketch with no depth on it

![Hunter green linen-look bay window cushion with ivory piping and one clipped corner, beside a bed with white linen bedding](https://cushionguide.com/media/bay-window-cushions/hunter-green-clipped-bay-seat-cushion-bedroom-1600.webp "A hunter green cushion with ivory piping and one clipped corner fills a bedroom bay beside the bed.")

A hand sketch gave 95 in (241 cm) front, 61 in (155 cm) top, 22 in (56 cm) angled sides and 10.5 in (27 cm) lower edges, but no depth. The other edges implied about 24.5 in (62 cm); the real depth was 27 in (69 cm).

**The takeaway:** Measure depth square to the long edge and write it on every sketch.

> **Tailor's margin:** A bay sketch without depth got estimated at 24.5 in. The real depth was 27 in. Write the depth down.

### 07. Five windows, 16 inches deep

![Oatmeal crinkle-textured angled bay window seat cushion on cream shaker cabinets with a waffle throw, books and mug](https://cushionguide.com/media/bay-window-cushions/oatmeal-textured-angled-bay-seat-afternoon-sun-1600.webp "An oatmeal cushion cut to an angled bay, without piping so the texture wraps the edge.")

A five-window bay seat: 115 7/8 in (294 cm) long, only 16 in (41 cm) deep, 4 in (10 cm) thick, with contrast piping. The bungalow pattern in one cushion: shallow depth, long run, a break at every window.

**The takeaway:** On a long shallow bay, measure every breaking point, not just the two ends.

> **Tailor's margin:** A five-window bay seat can run 115 7/8 in long and just 16 in deep. Measure every breaking point.

### 08. Posts in the corners, tape bent around them

![Blush pink and white stripe angled window seat cushion with self piping, cream pillows and throw on a white bay bench](https://cushionguide.com/media/trapezoid-cushions/blush-pink-stripe-angled-window-seat-cushion-1600.webp "Stripes run front to back so the eye reads depth, and the self-piped edge keeps the pattern unbroken.")

A buyer in the US sent 115.5 in (293 cm) front, 54.5 in (138 cm) back, 30.5 in (77.5 cm) deep, 8.5 in (22 cm) ends and 39 in (99 cm) slants; the geometry said about 37.5 in (95 cm). Corner posts had bent the tape, and 4 in had come off the true 58.5 in (149 cm) back for clearance.

**The takeaway:** With posts in the way, say so and let the maker calculate the slants.

> **Tailor's margin:** Corner posts bend the tape. With posts in the way, send front, back and depth; the slants get calculated.

## Slant as written against slant that closes

Four bays from past orders, checked the way the [trapezoid cushion calculator](https://cushionguide.com/studio/trapezoid-cushion-calculator/) checks them.

| The bay | Slant as written | Slant that closes | The fix |
|---|---|---|---|
| 90 / 52 in edges, 27 in deep, 6 in ends | 24 in (61 cm) | about 28 in (71 cm) | Redrawn with the straight ends |
| 86.5 / 39.5 in edges, 24.5 in deep, 2 in ends | 31 in (79 cm) | about 32.5 in (83 cm) | Re-measured; the slants really were 32.5 in |
| 115.5 / 54.5 in edges, 30.5 in deep, 8.5 in ends | 39 in (99 cm) | about 37.5 in (95 cm) | Corner posts explained; template confirmed |
| 103 / 73 in edges, 19 in deep, frame sides | 21.5 in (55 cm) | about 24 in (61 cm) | Short straight returns drawn in |

> An angled side on a bay cushion is always longer than the straight depth it spans. If a sketch shows it shorter, one of the numbers is wrong.
>
> — Nate

## Bay questions

**A common question:** What do you actually need from me to make a trapezoid cushion for a bay window?

**The workshop's answer:** Every edge: front, back, both angled sides, any short straight ends or clipped corners, plus the straight depth and thickness. Measure each angled side on its own, mark cut-outs such as a window handle, and send a labeled drawing with a photo.

**A common question:** My bay seat isn't symmetrical and there's wood sticking out on one side. Can you still make it?

**The workshop's answer:** Yes. Asymmetric bays go through the custom-shape order, not the rectangle one. A hand sketch with every edge, any cut-ins and the depth is enough, plus a photo; a traced paper template works too. The cushion is cut to your drawing.

**A common question:** My measurements come out in fractions, like 19 3/8 inches. Is that a problem?

**The workshop's answer:** No. Half, quarter and other fractional inches are fine, and so are centimeters. The menu size only sets the price range; the cushion is made from the exact size you write in the note and on the drawing.

## Straight returns, slants and long bays

### Why can't a bay cushion's angled side be shorter than the depth it covers?

The angled side runs on a diagonal; the depth runs straight back at 90 degrees. A diagonal always covers more distance than the straight line beside it, so a slant drawn shorter than its depth means a wrong number.

### What is a straight return on a bungalow window seat?

The short straight edge at each end of a bay seat, before the angled side begins. In the bays above they ran from 2 in (5 cm) to 8.5 in (22 cm). Left off a drawing, they turn square ends into points.

### Should a long bungalow bay cushion be made in one piece?

Not always. For trapezoids around 79 in (2 m) or more on the long side, the workshop may suggest two pieces, which are easier to make and handle. See [one piece or two](https://cushionguide.com/guides/long-bench-cushion-one-piece-or-two/).

## Related at the atelier

- [Big bays, long seats: where to split a large bay window cushion](https://cushionguide.com/concepts/large-bay-window-cushions/): A large bay window cushion longer than about 7.5 ft (2.3 m) is usually best made in two or more pieces, joined at a bay corner or at the midpoint.
- [Cushions for Chicago bungalow bays, two-flats and porches](https://cushionguide.com/places/chicago-cushions/): A Chicago bungalow window seat cushion is a clipped trapezoid: a long straight front, a center window panel, two slanted sides and usually short straight returns at each end.
- [Bay Window Cushion in Caramel Bouclé for Long Sitting](https://cushionguide.com/readings/caramel-trapezoid-bay-cushion-cream-piping-arched/): A bay window seat cushion for long sitting usually starts at the workshop's standard 4 in (10 cm), which most buyers find comfortable; 5 to 8 in are made when you want more.
- [Bay Window Cushion in Navy Stripe: Mistakes the Angle Avoids](https://cushionguide.com/readings/navy-stripe-angled-bay-window-seat-cushion/): To order a bay window cushion with an angled end, send a drawing with every edge labeled, short straight returns included, and both diagonals measured, because old bays are rarely square.
- [Bay Window Cushion in Flax Linen: Wine Piping in Changing Light](https://cushionguide.com/readings/flax-bay-window-cushion-wine-piping-striped-lumbar/): Check a bay window cushion fabric in the bay itself at three times of day, because a three-panel bay lights the seat from several directions and the color shifts with them.
- [How do I measure a bay window seat for a cushion?](https://cushionguide.com/answers/how-to-measure-bay-window-seat-cushion/): Measure a bay window seat by sketching it from above and writing every edge length on the drawing: the back edge against the window, the front edge, each angled side, and the depth from front to back.
- [How to measure a trapezoid cushion so the numbers close](https://cushionguide.com/guides/trapezoid-cushion-measurements/)
- [Measuring a 3-sided bay window seat cushion, panel by panel](https://cushionguide.com/guides/bay-window-seat-cushion-3-sided/)

*± 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/concepts/craftsman-bungalow-window-seat-cushions/