How to Make a Duvet Insert

Emma Jul 01, 2026

Transforming your bed into a cozy sanctuary is as easy as making your own duvet insert. Not only is it a cost-effective solution, but it also allows you to customize the size, fill, and fabric to suit your preferences. Let's dive into a step-by-step guide on how to make a duvet insert that's perfect for you.

The Best Fluffy Duvet Inserts: 7 Things to Look For (To Get a Fluffy, Hotel-Like Bed)!
The Best Fluffy Duvet Inserts: 7 Things to Look For (To Get a Fluffy, Hotel-Like Bed)!

Before we begin, gather your materials: fabric for the outer shell, batting for the filling, scissors, sewing machine, and thread that matches your fabric. Also, measure your mattress to ensure your duvet insert fits perfectly.

How to Make a Duvet Cover
How to Make a Duvet Cover

Choosing the Right Fabric and Filling

Selecting the right fabric and filling is crucial for a comfortable and durable duvet insert.

a pink piece of paper that says make your own damn duvet
a pink piece of paper that says make your own damn duvet

For the outer shell, choose a fabric that's breathable, easy to clean, and complements your bedding. Popular choices include cotton, linen, and polyester blends. Ensure the fabric is large enough to cover all sides of your duvet insert with extra room for seams.

Understanding Fabric Weights

an unmade mattress is on the floor in front of a window with two arrows pointing to it
an unmade mattress is on the floor in front of a window with two arrows pointing to it

Fabric weights are measured in ounces per square yard (OSY). Lighter fabrics (1-3 OSY) are ideal for summer, while heavier fabrics (6-8 OSY) provide extra warmth during winter.

For a year-round duvet, consider using a lightweight fabric for the top and a heavier one for the bottom. This creates a balanced insert that's comfortable in all seasons.

Selecting the Right Filling

7 Easy Steps to Put a Duvet Insert into a Duvet Cover - 21 Lane
7 Easy Steps to Put a Duvet Insert into a Duvet Cover - 21 Lane

Batting is the filling material that provides insulation and softness. Common types include polyester, down, and wool.

Polyester batting is affordable, hypoallergenic, and easy to care for. Down batting offers superior warmth and softness but can be more expensive and may not be suitable for those with allergies. Wool batting is another excellent insulator but can be more expensive and less breathable than other options.

Measuring and Cutting Your Fabric

the diy duvet cover from 2 flat sheets is easy to make and it's so cute
the diy duvet cover from 2 flat sheets is easy to make and it's so cute

Accurate measurements are key to creating a duvet insert that fits perfectly.

Measure your mattress lengthwise and widthwise, then add 4-6 inches to each dimension for overhang. Cut two pieces of fabric according to these measurements. If you're using different fabrics for the top and bottom, cut two of each.

How to Make a Duvet Cover Larger - Dans le Lakehouse
How to Make a Duvet Cover Larger - Dans le Lakehouse
an easy way to cover a duvet the easy way in less than 2 minutes
an easy way to cover a duvet the easy way in less than 2 minutes
how to make a duvet cover very easy with blue sheets and ruffles
how to make a duvet cover very easy with blue sheets and ruffles
How to Put On a Duvet Cover
How to Put On a Duvet Cover
How to Cover a Duvet the EASY Way
How to Cover a Duvet the EASY Way
a woman standing in front of a bed with her hands out and the words, add your duvet cover without breaking a sweat
a woman standing in front of a bed with her hands out and the words, add your duvet cover without breaking a sweat
How to Insert a Duvet the Easy Way
How to Insert a Duvet the Easy Way
Duvet Cover Tutorial
Duvet Cover Tutorial
How To Make A Duvet Cover: Official Sewing Tutorial ✂️
How To Make A Duvet Cover: Official Sewing Tutorial ✂️
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How to Put a Comforter in a Duvet Cover
How to Make a Quilted Duvet Cover
How to Make a Quilted Duvet Cover
How To Prevent A Shifty Duvet - DIY Duvet Cover Corner Ties Tutorial! - Making Things is Awesome
How To Prevent A Shifty Duvet - DIY Duvet Cover Corner Ties Tutorial! - Making Things is Awesome
How to Keep A Duvet Cover in Place with Fabric Tape
How to Keep A Duvet Cover in Place with Fabric Tape
Best Duvet Inserts for Every Season Cozy Comfort Guide
Best Duvet Inserts for Every Season Cozy Comfort Guide
Easy Trick to Putting on a Duvet Cover - Lemons, Lavender, & Laundry
Easy Trick to Putting on a Duvet Cover - Lemons, Lavender, & Laundry
How to Put on a Duvet Cover the Easy Way
How to Put on a Duvet Cover the Easy Way
Sew Ties on a Duvet Cover (When Your Duvet Cover Is Larger Than Your Duvet)
Sew Ties on a Duvet Cover (When Your Duvet Cover Is Larger Than Your Duvet)
a pink piece of paper with writing on it that says, when they are connected
a pink piece of paper with writing on it that says, when they are connected

Accounting for Seams

To accommodate seams, subtract the width of your seam allowance (usually 1/2 inch) from each side of your measurements.

For example, if your mattress is 78 inches long and you want a 6-inch overhang, your fabric piece should be 84 inches long. Subtract 1 inch for the seam allowance, so your fabric piece should be 83 inches long.

Cutting the Batting

Cut your batting to the same size as your fabric pieces. If your batting is not large enough, you can piece together smaller batting scraps, ensuring they're well-aligned and secure.

Alternatively, you can use a technique called "shingling" to create a smooth, even layer of batting. This involves cutting long strips of batting and overlapping them like shingles on a roof.

Assembling Your Duvet Insert

Now that you have your fabric and batting cut, it's time to assemble your duvet insert.

Place one fabric piece right side down on your work surface. Lay the batting on top, ensuring it's centered and smooth. Place the second fabric piece on top, right side up, aligning it with the first piece.

Sewing the Sides

Starting at one corner, sew around the edges, leaving the top open. Use a 1/2-inch seam allowance and backstitch at the beginning and end to secure your stitches.

When you reach the corner, use a technique called "clipping the corners" to reduce bulk. Cut off the excess fabric and batting in the corner, leaving a small seam allowance. Continue sewing around the edges until you reach the top.

Sewing the Top

To create a flat, even top edge, use a technique called "envelope closure." Fold the top edge of one fabric piece down, creating an "envelope" with a 1-2 inch opening. Sew along the folded edge, leaving the opening unsewn.

Repeat this process on the other fabric piece. Once both pieces are sewn, place them right sides together, with the openings facing each other. Sew around the top edge, leaving the openings unsewn. Turn your duvet insert right side out through one of the openings.

Fluff your duvet insert, ensuring the batting is evenly distributed. Press the seams with an iron to create a smooth, professional finish. Your custom duvet insert is now ready to use!

Enjoy the satisfaction of sleeping under a cozy, handmade duvet insert that's tailored to your needs. Happy sewing, and sweet dreams!