How to Crochet an Envelope Pillow: The Piazza Pillow Pattern
There is something deeply satisfying about a pillow that looks like it required serious skill but actually comes together in a single afternoon. The Piazza Pillow is exactly that kind of project. With its clean lines, textured stitch work, and elegant envelope closure on the back, it looks like something you pulled from a high-end home décor boutique — but you made it yourself, with yarn and a hook, probably while watching your favorite show.
This pattern is perfect for intermediate crocheters who want to level up their home décor game, and it is honestly manageable for confident beginners who are comfortable with basic stitches and working in rows. The envelope-style back closure is the secret to what makes this pillow so special. No zippers, no buttons, no sewing in a traditional sense — just two overlapping flaps that tuck neatly together to hold your pillow insert in place. Once you make one, you will want to make a dozen more in every color.
Let’s walk through everything you need to know to create your own Piazza Pillow from start to finish.
What Is an Envelope Pillow?
Before we get into the pattern itself, it helps to understand what makes an envelope pillow different from a standard pillow cover. A traditional pillow cover either zips closed or is sewn shut on all four sides. An envelope pillow, on the other hand, has an open back made from two overlapping panels — much like the flap of an envelope. The pillow insert slides in from the back, the flaps overlap to keep it secure, and the front of the pillow looks completely seamless.
This construction style is incredibly practical for crocheters because it avoids the need for a zipper or any complicated closures. It also makes washing the cover much easier — just pull the insert out, toss the cover in the wash, and reassemble when it is clean. The overlap is usually generous enough that the insert never peeks out, giving the pillow a polished, professional look.
Materials You Will Need
Getting your materials together before you start will make the entire process smoother. Here is what you need for the Piazza Pillow:
Yarn: Choose a medium weight (category 4) yarn in 100% cotton or a cotton blend. Cotton works beautifully for home décor projects because it holds its shape well, has a slight sheen that photographs beautifully, and washes easily. You will need approximately 400–500 yards depending on your pillow size. Some lovely options include Lion Brand 24/7 Cotton, Paintbox Simply DK Cotton, or Premier Yarns Cotton Fair. A solid or lightly variegated color works best to show off the texture of the stitches.
Hook: A size 5mm (H-8) crochet hook is a good starting point for medium weight cotton yarn, but always check your gauge before beginning. If you crochet loosely, try a 4.5mm hook. If you tend to crochet tightly, a 5.5mm may give you better results.
Pillow Insert: A 16×16 inch or 18×18 inch pillow insert works well for this pattern. Down or down-alternative inserts give the pillow that plump, luxurious look. Always size up slightly — using an 18-inch insert in a 16-inch cover, for example — to get a full, structured result rather than a flat, floppy one.
Notions: You will need a yarn needle for weaving in ends and seaming, scissors, stitch markers, and a tape measure. A blocking mat and pins are optional but highly recommended if you want a truly polished final product.
Gauge
Gauge: 14 stitches x 16 rows = 4 inches in half double crochet
Take the time to make a gauge swatch before starting the full project. Make a swatch of at least 20 stitches wide and 20 rows tall, then measure the center 4 inches in both directions. If your gauge is off, adjust your hook size accordingly. Even a small gauge discrepancy can add up over a large project and leave you with a pillow cover that is too small or too large for your insert.
Abbreviations and Stitch Guide
This pattern uses standard US crochet terminology. Here are the abbreviations you will encounter:
ch – chain
sl st – slip stitch
sc – single crochet
hdc – half double crochet
hdc blo – half double crochet through the back loop only
st(s) – stitch(es)
RS – right side
WS – wrong side
rep – repeat
sk – skip
The primary texture stitch used in the Piazza Pillow is the half double crochet through the back loop only (hdc blo). Working through only the back loop of each stitch creates a subtle, ribbed texture that gives the pillow its dimensional look and elegant feel. It is a simple technique — just insert your hook under only the back loop of each stitch rather than under both loops — but it transforms a plain fabric into something that looks intentional and refined.
Pattern Notes
Read through all the notes before beginning. They will save you from confusion mid-project.
The pillow is made in three pieces: one front panel and two back panels (the envelope flaps). All three pieces are worked flat in rows.
The front panel is a square worked in the hdc blo texture stitch.
The two back panels are also worked in hdc blo but are made to different lengths so they overlap at the center back. The longer panel forms the bottom flap, and the shorter panel forms the top flap.
The pieces are joined using a slip stitch seam along three sides (for the front-to-back assembly), which creates a clean, flat seam that lies neatly when the pillow is stuffed.
Chain-3 turning chains do not count as a stitch in this pattern. Always work your first stitch into the first stitch of the row, not into the turning chain.
The Piazza Pillow Pattern
Front Panel
The front panel forms the face of your pillow — the part that will be visible when the pillow is displayed. It is worked as a simple square with the hdc blo texture stitch throughout.
Foundation Chain: Chain 57. (This creates a working width of 56 stitches once you begin your first row. Adjust this number up or down in increments of 2 if you are making a different size.)
Row 1 (RS): Hdc in the 3rd chain from the hook and in each chain across. (56 hdc total) Turn.
Row 2: Ch 2, hdc blo in each stitch across. Turn.
Repeat Row 2 until your panel measures 16 inches from the foundation chain, or matches the width of your pillow insert. This will be approximately 64 rows depending on your gauge, but measure as you go rather than relying solely on row count.
Fasten off and weave in ends.
Back Panel A (Bottom Flap)
This is the longer of the two back panels. It will sit on the inside when the pillow is assembled, with the other panel overlapping it.
Foundation Chain: Chain 57. (Same starting chain as the front panel.)
Row 1 (RS): Hdc in the 3rd chain from the hook and in each chain across. (56 hdc) Turn.
Row 2: Ch 2, hdc blo in each stitch across. Turn.
Repeat Row 2 until this panel measures approximately 10–11 inches. This represents roughly two-thirds of the total pillow height.
Fasten off and weave in ends.
Back Panel B (Top Flap)
This is the shorter panel. It overlaps Panel A at the center back to create the envelope closure.
Foundation Chain: Chain 57.
Row 1 (RS): Hdc in the 3rd chain from the hook and in each chain across. (56 hdc) Turn.
Row 2: Ch 2, hdc blo in each stitch across. Turn.
Repeat Row 2 until this panel measures approximately 8–9 inches. This represents a little more than half of the total pillow height.
Fasten off and weave in ends.
Edging (Optional but Recommended)
Before assembling the panels, work a single row of single crochet along the open edge (the edge that will form part of the envelope opening) of each back panel. This stabilizes the edge and gives it a neat, finished look.
Join yarn to the corner of the edge you want to finish. Work 1 sc in each stitch or row end across. Fasten off and weave in ends.
If you want a more decorative edge, you can work a simple picot border or a row of reverse single crochet (crab stitch) along these edges instead.
Assembling the Piazza Pillow
Assembly is where the magic happens, and it is much simpler than it might seem. Take your time with this step and the result will be a clean, professional-looking cover.
Step 1: Block Your Pieces
If you have a blocking mat and pins, now is the time to use them. Wet each panel with cool water, gently squeeze out the excess (do not wring), and pin each piece to the mat in its correct dimensions. Allow them to dry completely before assembly. Blocking evens out your stitches, sets the final dimensions, and gives the cotton yarn a beautiful drape.
Step 2: Lay Out the Panels
Place the front panel flat on your work surface with the wrong side facing up. Lay Back Panel A on top of it with the right side facing up, aligning the bottom and side edges. Then lay Back Panel B on top of everything with the right side facing down, aligning the top and side edges. Back Panel B should overlap Back Panel A in the center. The two back panels together should cover the entire width and height of the front panel, with an overlap of several inches in the center.
Step 3: Pin Everything Together
Use stitch markers or straight pins to secure all three layers together along the left side, right side, and top edges of the assembly. The bottom of Panel A and the top of Panel B are your opening edges — do not seam these.
Step 4: Seam the Three Sides
Using a yarn needle and a length of your project yarn, seam all three pinned edges using a whip stitch or a mattress stitch. Alternatively, join the layers with a crochet slip stitch seam for a more secure finish. To do a slip stitch seam, hold the layers together with right sides facing and use your hook to work slip stitches through both layers simultaneously along each edge.
Work all three sides, fasten off at each corner, and weave in all ends securely.
Step 5: Turn Right Side Out and Insert the Pillow
Reach through the envelope opening on the back of the pillow, grip the opposite corner, and gently pull the cover right side out. Give it a gentle tug and smooth to shape. Slide your pillow insert in through the back opening, adjusting it until it fills the cover evenly. Fluff the corners of the pillow insert into the corners of the cover.
Stand back and admire your work.
Customizing the Piazza Pillow
One of the best things about the Piazza Pillow is how easily it adapts to different styles, color palettes, and skill levels. Here are some ideas for making the pattern your own.
Size Variations: To make an 18-inch pillow, add stitches to your foundation chain in increments of 2 and adjust your row count until each panel matches the new dimensions. You will need approximately 100–150 additional yards of yarn for an 18-inch version.
Color Blocking: Work the front panel in one color and the back panels in a contrasting color, or work horizontal stripes across the front by changing colors every few rows. Because the hdc blo stitch has a defined ridge line, color changes between rows look especially clean and sharp.
Stitch Swaps: Try replacing the hdc blo texture with a moss stitch (alternating single crochets and chains), a linen stitch, or a simple basket weave for a different look. The construction of the pillow stays exactly the same — only the stitch pattern changes.
Button Closure: If you prefer a more secure closure, sew two or three buttons along the edge of Back Panel B and make corresponding button loops on Back Panel A by crocheting short chains between stitches at the appropriate intervals. This adds a decorative element to the back of the pillow and keeps the insert firmly in place.
Decorative Front Panel: Once you are comfortable with the basic construction, experiment with motifs on the front panel. A center granny square surrounded by solid rows, an intarsia initial, or a row of embroidered flowers added after the fact can all transform the pillow into a truly personalized piece.
Care Instructions
Cotton crochet covers are wonderfully easy to care for. Machine wash on a gentle cycle with cold water and lay flat to dry, or tumble dry on low heat. Avoid high heat, which can shrink cotton and distort your stitches. If the cover becomes wrinkled after washing, a quick press with a steam iron on the cotton setting will restore its crisp appearance. For pillow inserts, follow the manufacturer’s care instructions, though most down-alternative inserts are machine washable on a gentle cycle as well.
Tips for Success
A few practical notes that will make your experience with this pattern smoother from start to finish.
Count your stitches at the end of every row, especially at the beginning of the project. It is easy to accidentally add or drop a stitch when working into a foundation chain, and catching the error early saves a lot of frustration. Place a stitch marker in the last stitch of each row as a visual reference for when you turn and work back.
Keep your tension consistent throughout. The hdc blo stitch can tighten up if you are gripping your yarn too firmly, especially after a break. Take a moment to loosen your grip whenever you sit back down to crochet.
If your edges are coming out wavy or uneven, try going up half a hook size. The turning chain at the beginning of each row can pull the edge in if it is too tight, and a slightly larger hook often solves this problem without affecting the overall gauge.
Measure your panels frequently rather than relying on row counts. Everyone crochets a little differently, and your actual row height may vary from the numbers given here. The only measurement that truly matters is the finished dimension of each piece relative to your pillow insert.
Final Thoughts
The Piazza Pillow is the kind of pattern that earns a permanent place in your rotation. It is simple enough that you can work on it without constant reference to the pattern, textured enough to keep it interesting, and the envelope construction makes it genuinely functional and beautiful at the same time. Whether you make it in a soft neutral to complement an existing room or a bold, saturated color to become the focal point of a sofa, it delivers results that feel elevated and intentional.
If you make your own Piazza Pillow, share it — tag your work, leave a comment, or photograph it in its new home. Seeing how other crocheters interpret a pattern is one of the great joys of this craft. Every finished pillow tells a slightly different story through color, texture, and the particular quality of the maker’s hands, and that is what makes handmade objects worth making in the first place.
Happy crocheting.
