How to Sew Throw Pillows: Easy Beginner's Guide

Posted by BLG on 2026 Aug 4th

How to Sew Throw Pillows: Easy Beginner’s Guide

Woman sewing a throw pillow cover at home

You can sew a finished decorative throw pillow cover using straight stitching and one of two closure methods. No complex fitting, no curved seams. The result looks store-bought, and the skills you pick up — pivoting corners, pressing seams, finishing edges — carry into almost every other sewing project you’ll ever attempt.

Here’s what this guide covers:

What you’ll make: A removable pillow cover (envelope back or hidden-zipper closure) sized to fit a standard pillow insert
Difficulty: Beginner. Throw pillows are built almost entirely on straight stitching with simple corner pivots and minimal hand sewing
Time: 45–60 minutes for the envelope method; 75–90 minutes for the zipper version
First choice to make: Envelope closure (fastest, no zipper needed) or hidden-zipper closure (more polished, fully washable)

Both methods are taught below, step by step.

What materials and tools do you need to sew throw pillows?
How do you calculate the right fabric cut size?
How to prepare your fabric before cutting
How to sew an envelope-back pillow cover
How to sew a pillow cover with a hidden zipper
Finishing, stuffing, and caring for your pillow
Common beginner mistakes and how to fix them
How do you choose the right fabric for throw pillows?
Key Takeaways
Why throw pillows are the best first sewing project
Find the right fabric for your pillow project at Fabric-fabric

What materials and tools do you need to sew throw pillows?

Tools

Sewing machine with a standard presser foot and a zipper foot
Fabric scissors or a rotary cutter with a self-healing cutting mat
Ruler and measuring tape
Pins or wonder clips
Iron and ironing board
Blunt turning tool (a chopstick works perfectly)
Seam ripper
Fabric marking pen or tailor’s chalk

Materials

Fabric: Front panel plus back panel(s); see the table below for yardage
Thread: All-purpose polyester thread matched to your fabric
Pillow insert or polyfill stuffing: Inserts give a cleaner shape; polyfill works for sewn-shut pillows
Zipper (zipper method only): nylon coil, 2" longer than the pillow side
Fusible interfacing: Optional, but worth it for lightweight or loosely woven fabrics

Pro Tip: Buy your zipper slightly longer than the pillow edge and trim it down after installation. A longer zipper is far easier to sew near the ends without the pull getting in your way.

Size-to-fabric reference table

Close-up of fabric and sewing materials on table

Finished size	Cut size (front)	Cut size (back panels, envelope)	Approx. yardage (54" wide fabric)
16"	17" × 17"	Two panels: 17" × 12"	½ yd
18"	19" × 19"	Two panels: 19" × 13"	¾ yd
20"	21" × 21"	Two panels: 21" × 14"	¾ yd
22"	23" × 23"	Two panels: 23" × 15"	1 yd
24"	25" × 25"	Two panels: 25" × 16"	1 yd

Cut sizes include a ½" seam allowance on all sides. Back panel overlap is approximately 4".

How do you calculate the right fabric cut size?

The math trips up a lot of beginners, so here it is plainly: your cut size is always larger than your finished size, which is itself slightly smaller than your insert size.

Infographic illustrating steps to sew throw pillows

That last part is intentional. Cutting your cover about ½" smaller than the insert gives you a snug, plump look rather than a saggy one. A pillow insert that fits loosely inside a cover always looks deflated, no matter how nice the fabric is.

Step-by-step example for an 18" finished pillow:

Choose an 18" pillow insert (or buy a 19" insert for extra plumpness)
Decide on a ½" seam allowance (standard for pillow covers)
Add seam allowance to each side: 18" + ½" + ½" = 19"
Cut your front panel at 19" × 19"
For envelope backs: cut two panels at 19" × 13" (overlap of about 4" when assembled)

Common sizes and where they work best:

16": Accent chairs, small loveseats, decorative bedroom stacks
18": The most versatile size; works on sofas, beds, and chairs. Recommended as the best first-project size
20": Standard sofa pillow; pairs well with 18" for a layered look
22"–24": Floor pillows, large sectionals, bed euro shams

How to prepare your fabric before cutting

Prewashing is non-negotiable for cotton and linen. Fabric shrinks in the first wash, and a cover that fits perfectly before laundering can end up too tight afterward. Wash and dry your fabric the same way you plan to wash the finished pillow, then press it flat before you cut.

Before you cut, check these four things:

Grainline: For directional prints like stripes or florals, align the grainline parallel to the selvage to prevent the cover from twisting over time. This is easy to miss and hard to fix after sewing.
Pattern matching: If your fabric has a large repeat, center the motif on the front panel before cutting.
Flat surface: Always cut on a flat table or cutting mat, never on carpet. A rotary cutter and acrylic ruler give cleaner edges than scissors alone.
Interfacing: If your fabric is sheer, lightweight, or loosely woven, fuse a light interfacing to the wrong side before cutting. It stabilizes the fabric under the machine and prevents stretching at seams.

Pro Tip: Finish your raw edges before assembly — a quick zigzag stitch or a pass through a serger on each cut edge prevents fraying, especially on fabrics that will be washed regularly. Finished seams extend the life of any handmade pillow significantly.

Man pressing fabric for pillow sewing

How to sew an envelope-back pillow cover

The envelope method is the easiest removable cover you can make — no zipper, no hand stitching, and the insert slips in and out in seconds. Quilting cotton is the friendliest fabric for this method because it presses cleanly and feeds evenly through the machine.

What you need cut and ready:

One front panel (e.g., 19" × 19" for an 18" finished pillow)
Two back panels (e.g., 19" × 13" each)
Thread, pins, iron

Steps:

Hem the back panels. Fold one long edge of each back panel ½" toward the wrong side, press, fold again ½", press again, and stitch close to the fold. This is the overlap edge.
Lay out the front panel right side up on your work surface.
Position the back panels right side down on top of the front panel, hemmed edges overlapping in the center. The raw edges of both back panels should align with the raw edges of the front panel on all four sides. Pin all the way around.
Sew around the entire perimeter with a ½" seam allowance. Backstitch at the start and end. At each corner, stop with the needle down, lift the presser foot, pivot 90°, lower the foot, and continue. Use a stitch length of 2.5–3mm.
Trim the corners diagonally, cutting close to but not through the stitching. This removes bulk so corners turn sharply.
Turn right side out through the envelope opening. Use a chopstick or blunt turning tool to push each corner fully out from the inside.
Press the entire cover flat, paying attention to the seams and corners.
Insert the pillow form through the back opening.
Optional topstitch: Run a line of stitching ¼" from the edge all the way around for a tailored, structured look.

Pro Tip: Press every seam as you go — not just at the end. A quick press after hemming the back panels and again after turning makes a visible difference in the final result.

Time estimate: 45–60 minutes for a first attempt; under 30 minutes once you’ve made two or three.

How to sew a pillow cover with a hidden zipper

A hidden zipper (also called an invisible zipper) sits inside the seam so only the pull tab is visible. The result looks professional and holds up well through repeated washing. It’s a step up from the envelope method, but the technique is straightforward once you understand how the zipper sits.

Before you start:

Use a zipper foot (or an invisible zipper foot if your machine has one)
Cut one front panel and one back panel at the same size (e.g., 19" × 19")
Choose a nylon coil zipper about 2" longer than one side of your pillow

Steps:

Press the zipper coils open with a cool iron before sewing. This lets the foot stitch closer to the coil and hides the zipper more effectively.
Pin the zipper face-down along the top edge of the back panel, right sides together, coil aligned with the seamline. Stitch with the zipper foot as close to the coil as possible.
Attach the other side of the zipper to the top edge of the front panel the same way, right sides together.
Open the zipper partway (leave it open about 6" so you can turn the cover later).
Pin the front and back panels right sides together on the remaining three sides. Stitch around those three sides with a ½" seam allowance, backstitching at each end.
Close the zipper seam ends: fold the zipper tape out of the way and stitch the short seam at each end of the zipper to close the gap between the zipper and the corner seam.
Trim corners diagonally and trim the excess zipper tape flush with the seam allowance.
Turn right side out through the open zipper. Use a blunt tool to push corners out fully.
Press the cover flat. Test the zipper operation before inserting the pillow form.

Pro Tip: If your zipper edge looks wavy after sewing, the coil was probably not pressed open enough before stitching. Hand-baste the zipper in place first on slippery or stretchy fabrics — it takes two extra minutes and prevents the whole seam from shifting.

Finishing, stuffing, and caring for your pillow

Corners and turning

Trim the corner surplus after sewing but before turning, cutting diagonally across each corner about ⅛" from the stitching. Never use a pointed tool to push corners out — a chopstick or the eraser end of a pencil gives you a sharp corner without piercing the seam.

Inserting the form vs. stuffing

Pillow forms give a cleaner, more consistent shape. For the plumpest result, use a form that’s 1" larger than your finished cover size. If you’re stuffing with polyfill, work in small handfuls and push fill into the corners first, then the center. Overstuffing by about 10% gives a firmer feel that softens after a few days of use.

Closing a stuffed pillow

If you sewed the pillow shut (no envelope, no zipper), leave a 6" opening on one side, stuff the pillow, then close the opening with a ladder stitch using a hand-sewing needle and matching thread. Pull the thread snug after every few stitches so the seam stays invisible.

Care

Machine-washable fabrics (cotton, linen, canvas): cold water, gentle cycle, tumble dry low
Velvet and textured fabrics: spot clean or dry clean; heat flattens the pile permanently
Outdoor fabrics: wipe clean with a damp cloth; most are not designed for machine washing

Pro Tip: Remove the pillow insert before washing the cover whenever possible. Washing the cover alone keeps it cleaner longer and protects the insert from compression damage.

Common beginner mistakes and how to fix them

Uneven or rounded corners: Almost always caused by skipping the corner trim. Clip diagonally after sewing, then use a blunt tool to push the corner fully into the point. If the corner still looks soft after turning, press it firmly with a hot iron and a damp cloth.

Puckering along seams: Usually a tension issue or a needle that’s too large for the fabric. Drop your stitch length to 2.5mm, check that your thread is seated correctly in the tension discs, and switch to a fresh needle. A size 80/12 universal needle handles most quilting cotton and linen without puckering.

Bulky seams at corners: Grade your seam allowances by trimming the corner at an angle and trimming each layer to a slightly different width. On zipper seams, trim the seam allowance to ¼" after stitching to reduce bulk near the pull.

Cover too loose: The insert is too small for the cover. Either size up your insert or resew the cover with a slightly larger seam allowance (try ⅝" instead of ½").

Cover too tight: The insert is too large, or the cover was cut too small. Let out the seam allowance by ¼" on each side — that adds ½" to the finished size, which is usually enough.

Pro Tip: Understitch the seam allowance to the lining or facing on any edge that tends to roll outward. Run a line of stitching through the seam allowance only, about ⅛" from the seamline, after pressing the seam open. It keeps edges flat without topstitching.

How do you choose the right fabric for throw pillows?

Fabric choice affects how the pillow looks, how long it lasts, and how easy it is to sew. Here’s a practical breakdown by use:

Quilting cotton: — Best for beginners. Presses beautifully, feeds evenly, and comes in thousands of prints. Ideal for bedroom and living room accent pillows.
Outdoor fabrics: — Solution-dyed acrylic (like Sunbrella) resists UV and moisture. Not beginner-friendly for hand-sewing, but straightforward on a machine with a heavy-duty needle.

Mixing textures is one of the simplest ways to make handmade pillows look curated. Pairing smooth linen with a chunkier bouclé or knit adds depth that a single-fabric grouping rarely achieves. You don’t need to sew the textures together — just place them on the same sofa.

For sourcing in North America, look for fabric listed by weight (oz/yd²), width (54" is standard for home decor), and care instructions. Fabric-fabric’s home decor fabric category covers upholstery-weight and decor-specific options suited to pillow projects, and its quilting fabric section is a strong starting point for cotton prints. For guidance on matching fabric to your specific decor style, the home decor fabric selection guide breaks down weight, width, and use-case in plain terms.

Pro Tip: Always prewash a small swatch and test colorfastness before cutting into a full yard. Lay the wet swatch on a white paper towel — if color transfers, the fabric will bleed in the wash.

Fabric type	Best use	Beginner-friendly?	Care
Quilting cotton	Bedroom, accent pillows	Yes	Machine wash cold
Linen/linen blend	Living room, natural decor	Yes	Machine wash gentle
Canvas/duck	High-traffic sofa pillows	Moderate	Machine wash cold
Velvet	Decorative, low-use pillows	No	Spot clean or dry clean
Outdoor fabric	Patio, sunroom pillows	Moderate	Wipe clean

Key Takeaways

Sewing a throw pillow cover requires accurate cut measurements, a ½" seam allowance, consistent pressing, and either an envelope or hidden-zipper closure to achieve a polished, store-bought finish.

Point	Details
Size your cover to the insert	Cut covers ½" smaller than the insert for a plump, snug fit.
Start with the envelope method	No zipper needed; a first cover takes 45–60 minutes with quilting cotton.
Press every seam as you go	Frequent pressing is the single biggest factor in a professional-looking result.
Clip corners before turning	Diagonal corner cuts reduce bulk and produce sharp, clean points.
Fabric-fabric for supplies	Browse home decor fabrics and quilting cottons to find the right weight and print for your project.

Why throw pillows are the best first sewing project

Most beginner sewing advice points people toward tote bags or zippered pouches. Throw pillows deserve that spot more. A tote bag has handles to attach and a flat bottom to engineer. A pillow is four straight seams and a closure. That simplicity isn’t a limitation — it’s the point.

What you actually learn from a pillow project is more useful than it looks on paper. You learn to pivot at corners without losing your seam allowance. You learn that pressing matters more than perfect stitching. You learn that a ½" difference in how you cut changes how the finished piece feels in your hands. Those lessons transfer directly to curtains, duvet covers, and eventually garments.

The other thing pillows give you is fast feedback. You start, you finish, you hold something real within an hour. That cycle of making and seeing the result is what builds the confidence to try harder projects. Experiment with decorative trims like piping or pom-pom fringe on your second or third pillow — the construction stays the same, but the result looks completely different. If you want to keep building skills after your first pillow, the beginner sewing project guide at Fabric-fabric is a solid next step.

Find the right fabric for your pillow project at Fabric-fabric

The hardest part of a first pillow project is usually not the sewing. It’s standing in front of a wall of fabric options and not knowing which one will actually work. Fabric-fabric takes that friction away with detailed product descriptions that include fabric weight, width, care instructions, and suggested uses — exactly what you need to make a confident choice before you cut a single inch.

Fabric-fabric

For pillow projects, start with the home decor fabric category, which carries upholstery-weight and medium-weight options suited to sofa and accent pillows. Cotton prints for lighter bedroom pillows are in the quilting section. Larger or specialty projects — oversized floor pillows, backdrop-style panels — are covered under backdrop fabrics. Browse the descriptions, check the yardage against the table above, and order a sample if you’re committing to a larger cut. Your first pillow is closer than you think.