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Foam Cushion & Cover

for wheelchair, sofa, chair, or bench

wheelchair cushion and cover pattern

Custom Foam Cushion & Removable Cover

Designer: Kayla Sherrod

More Cushion Cover Patterns
Bling Your Chair

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Cushion With Mitered Corners

These instructions will make a perfect fitting seat cushion and cover for your sofa, wheelchair, chair or bench. Mitered corners make a nice fit, and an envelope back opening allows easy insetion and removal of the cushion. I used these instructions to make a nice doll bed "mattress" and cover. I needed a custom mattress to go with the wood cradle my father had made for my daughter.

This pattern can be used to create a comfortable, square or rectangular foam cushion and cover in any size. We layered high density foam with low density foam to create a very comfortable seat cushion.

Adjust instructions to make your own cushion any size you need.

Seat Cushion/Cover Size

Our cushion and cover measures 15" x 17" x 4" (we used two pieces of 2" thick cushion so the overall thickness was 4"). Adjust our instructions to create the right sized cushion for your needs.



One piece of high density foam, measuring 15" x 17" x 2"

One piece of low density foam, measuring 15" x 17" x 2"

NOTE: Measure your wheelchair seat (or chair or bench) to be sure this is the correct size for your chair. I purchased my foam at a fabric store, and it was already pre-cut to this size, which was perfect for the chair I was making this cushion for. I experimented with foam pieces and found that placing the high density foam on the bottom and layering the lower density foam on top provided the most comfort.


Cut enough fabric to cover your cushion. Refer to Cushion Cover Instructions for detailed information on measuring cushions, or refer to the directions below. Remember that this project's cushion is 4" thick.

thread to match background of fabric
large sewing ruler (optional but nice to have)
scissors or rotary cutter / cutting mat

Directions - all seams 1/4"

wheelchair cushion 1. Cut Cushion Cover Top

The formula for the cushion cover top length (L)is: L = length of cushion plus cushion depth plus 1/2" (for seam allowances).
Using our cushions, L = 17" plus 4" plus 1/2".

The width (w) = width of cushion plus depth of cushion plus 1/2".
Using our cushion, W = 15" plus 4" plus 1/2".

For my cushion cover top, I cut a piece of fabric measuring 21.5" x 19.5"

Directions - all seams 1/4"

2. Cut Two Cushion Cover Bottom Pieces

The back is made up of two pieces. The width is the same as the top piece. For the length, we will use the measurement of the top length, and adjust it a bit. Add 3" for overlap plus 1.5" for hems. The width is still 19.5", and the length is 26".
For my cushion cover back, I cut a piece of fabric measuring 26" x 19.5".

Cut the back piece into two pieces, across the width. I made my cut about 8" from one end.

For my cushion cover top, I cut a piece of fabric measuring 21.5" x 19.5"

3. Hem Back Pieces

Turn under one edge of both back pieces 1/4". Press. Turn under another 1.5". Press. Topstitch hems.

NOTE: The images below are of a cushion cover I made to use as a doll bed. The cushion worked as the mattress and the cover made a nice "matress" cover.

hem edges
edges hemmed

hem edges
edges overlapped

wheelchair cushion cover 4. Sew Back To Front

Place the front piece on a flat surface, right side up. Place one of the small back piece on top of the front piece, wrong side up. Place it so that unhemmed edge lines up with the top edge of the front, and the hemmed edge is toward the bottom. Place the second back piece on top of the other two pieces, wrong side up. Place it so that the unhemmed edge is lined up with the bottom edge of the front, and the hemmed edge is toward the top. Stitch around all four sides. Refer to drawing.

miter 5. Draw Miter For Corners

Draw Miter Lines Divide the depth of your cushion in two. Our cushion depth was 4". Therefore I used a measurement of 2". Use this number as the size of your square.

Using a quilter's square, or other measuring device, and a fabric marker draw a square in each corner. I drew a 2" in each corner. The 2" started at the stitch line of the seam.

cut miter 6. Cut The Miter Square

Using sharp scissors, cut out a square 1/4" from the square you drew. Your cut-out will be 1/4" SMALLER than the square you drew.

Pull apart the layers and line up the seams so one is on top of the other. Line up the top cut edges. Pin layers together. Stitch layers. The stitch line is enhanced in red in the image below. This creates the mitered corner. Repeat on all four corners.

line up square miter

stitch miter

wheelchair cushion Turn the cover right side out. Place the foam pieces inside your beautiful new cover. Remember that the denser foam goes on the bottom.

Bling Project: Add bling to your chair.

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