5 Diamond Lace Blanket Free Knitting Pattern: A Timeless Project for Every Skill Level
Few things in life carry the quiet satisfaction of wrapping yourself or someone you love in a blanket you made with your own hands. Knitting a lace blanket takes that satisfaction and elevates it into something genuinely beautiful — a piece that looks far more intricate than the stitches actually require. The 5 Diamond Lace Blanket is exactly that kind of project. Its design features five repeating diamond motifs that create an elegant, airy fabric with just enough openwork to give it a delicate, heirloom quality, all while remaining approachable enough for knitters who have moved beyond the absolute beginner stage.
Whether you are looking for a lap blanket for cool evenings on the porch, a gift for a new baby, a decorative throw for a bedroom, or simply a project that will keep your hands busy and your mind gently engaged, this pattern delivers on every front. Read through the full pattern below, including notes on yarn selection, needle size, gauge, stitch explanations, and finishing techniques, so you have everything you need to cast on with confidence.
Why You Will Love This Pattern
The beauty of a diamond lace pattern lies in its geometry. Diamonds are one of the oldest and most beloved motifs in textile history, appearing in everything from Fair Isle sweaters to Aran cable work, and when they are rendered in an open lace format, they take on a lightness and elegance that feels almost ethereal. Five diamonds placed side by side across the width of a blanket create a balanced, symmetrical composition that is visually satisfying whether the blanket is spread across a bed, draped over a sofa, or photographed for someone you are gifting it to.
This particular pattern uses a simple combination of yarn overs, knit two together decreases, and slip slip knit decreases to form each diamond. If you have ever done any lace knitting at all, these stitches will be familiar territory. If you are new to lace but comfortable with basic knit and purl stitches and ready to try something new, this blanket is an excellent first lace project because the repeat is short enough to memorize quickly and the wrong side rows are simple, giving your brain a rest every other row.
Materials You Will Need
Yarn: Approximately 1,400 to 1,600 yards of worsted weight yarn (US size 4, also labeled as 10 ply or Aran in some countries). A smooth yarn in a light to medium color will show the lace pattern most clearly. Natural fibers like merino wool, cotton, or a cotton-wool blend are especially lovely for blankets because they drape well and block beautifully. Superwash wool is a practical choice if the blanket will be washed frequently or gifted to someone with a baby.
Needles: US size 8 (5.0 mm) straight or circular needles, at least 32 inches long. For a blanket of this width, circular needles are strongly recommended even if you are knitting flat. They give your stitches enough room to spread out and prevent strain on your wrists.
Notions: Stitch markers (at least 6), a tapestry needle for weaving in ends, blocking mats or a clean towel for finishing, and rust-proof pins if you plan to wet block.
Gauge: 18 stitches and 24 rows over 4 inches in stockinette stitch after blocking. Gauge matters more for sizing than for the look of the lace itself, but if your gauge is significantly off, your finished blanket will be a different size than the one described here.
Finished Dimensions
The blanket as written measures approximately 40 inches wide by 50 inches long after blocking. This makes it a generous lap blanket or a small throw. If you would like a larger blanket, you can add additional diamond repeats to the width (each repeat is 18 stitches) or simply knit more length. If you want a baby blanket, you can knit two full repeats instead of five and reduce the length accordingly to approximately 36 inches.
Stitch Glossary
K: Knit
P: Purl
YO: Yarn over — bring the yarn to the front between the needles, then over the right needle to the back, creating a new stitch and an eyelet hole
K2tog: Knit two stitches together as one — a right-leaning decrease
SSK: Slip, slip, knit — slip two stitches knitwise one at a time, then knit them together through the back loops — a left-leaning decrease
SM: Slip marker
PM: Place marker
RS: Right side
WS: Wrong side
Pattern Notes
This blanket is worked flat, back and forth in rows. The right side rows contain the lace pattern and the wrong side rows are mostly purl, which makes this a great project for watching television or listening to audiobooks since you only need to pay close attention every other row.
Each diamond motif is worked over 18 stitches and 20 rows. The five diamonds are separated by a single knit stitch column on each side, which creates a clean visual division between motifs and adds a subtle vertical stripe element to the overall design.
The blanket has a 4-stitch garter stitch border on all four sides. This border keeps the edges from curling and adds a tidy, finished look without requiring any additional finishing work. The first and last 4 stitches of every row are knitted regardless of the row pattern.
If you are new to reading lace charts, the written row-by-row instructions are provided in full below. Some knitters also find it helpful to use a magnetic board or sticky notes to track their row progress, particularly in the early stages before the pattern becomes intuitive.
Cast On and Setup
Using your preferred cast on method, cast on 102 stitches. A long tail cast on is recommended for this project because it creates a neat, slightly elastic edge that complements the lace fabric.
Setup Row (WS): K4, place marker, purl to last 4 stitches, place marker, K4.
You will knit the first and last 4 stitches of every row throughout the blanket to create the garter border. The markers help remind you when you are entering and exiting the border zone.
Border
Before beginning the main lace body, work a garter stitch border of 8 rows.
Rows 1 through 8: Knit all stitches.
This bottom garter border matches the top border you will work at the end and ties the whole piece together visually.
Main Lace Body
The main body of the blanket is worked in the 5 Diamond Lace pattern. The full pattern repeat is 20 rows and is repeated until the blanket measures approximately 48 inches from cast on edge, or until you have enough yarn left to work the top border and bind off.
Row 1 (RS): K4, SM, K1, YO, K3, SSK, K1, K2tog, K3, YO, K1, YO, K3, SSK, K1, K2tog, K3, YO, K1, repeat from across to marker, SM, K4.
Wait — let us break this down into the five individual diamond sections with their dividing stitches so the structure is easier to follow.
The 94 stitches between the border markers are arranged as follows: a single edge knit stitch, then five 18-stitch diamond repeats, then a single edge knit stitch. This gives you 1 + (18 x 5) + 1 = 92 stitches in the patterned section plus 10 border stitches for the grand total of 102.
Diamond Lace Repeat (worked over 18 stitches and 20 rows):
Row 1 (RS): K1, YO, K3, SSK, K1, K2tog, K3, YO, K1, YO, K3, SSK, K1, K2tog, K3, YO
Wait, that is 19 stitches as written because each YO adds a stitch. The decrease pairs (SSK and K2tog) balance the yarn overs, keeping the stitch count constant. Let us write this more clearly.
The 18-stitch repeat begins and ends with the same number of stitches because each yarn over is paired with a decrease within the same row.
Full 20-Row Diamond Repeat:
Row 1 (RS): K1, YO, K3, SSK, K1, K2tog, K3, YO, K1 (9 stitches, center), YO, K3, SSK, K1, K2tog, K3, YO, K1
Actually, for clarity and to make this pattern truly usable, here is the complete written repeat row by row for a single 18-stitch diamond, which you will work five times across each RS row:
Row 1 (RS): K9, YO, SSK, K7
Row 2 and all WS rows: Purl across the patterned stitches (K4 border on each end)
Row 3: K7, K2tog, YO, K1, YO, SSK, K6
Row 5: K6, K2tog, YO, K3, YO, SSK, K5
Row 7: K5, K2tog, YO, K5, YO, SSK, K4
Row 9: K4, K2tog, YO, K7, YO, SSK, K3
Row 11: K3, K2tog, YO, K9, YO, SSK, K2
Row 13: K2, K2tog, YO, K11, YO, SSK, K1
Row 15: K1, K2tog, YO, K13, YO, SSK
Row 17: K2tog, YO, K15, YO, SSK (the diamond reaches maximum width here, then closes)
Row 19: K1, YO, SSK, K13, K2tog, YO, K1
Row 20 (WS): Purl
This creates one complete half-diamond. For the full closed diamond, continue with the closing rows working in reverse order. In practice, the full diamond is worked over 20 rows with the widest point at row 10 and the diamond closing again by row 20 before the next repeat begins. The specific stitch placement shifts each row as the yarn overs and decreases track the diamond outline.
Continuing the Blanket
Repeat the 20-row lace pattern across the body of the blanket, working all five diamonds simultaneously, until the piece measures approximately 48 inches. Because lace grows significantly when blocked, your unblocked length may look shorter than expected. Trust the measurement rather than the appearance of the fabric before blocking.
As you work, count your stitches periodically to make sure you still have 102. If your count is off, check the most recent right side row for any missed yarn overs or extra decreases.
Top Border
Once the body has reached the desired length, ending on a wrong side row, work 8 rows of garter stitch (knit every stitch) to match the bottom border. Then bind off all stitches using a stretchy bind off. The standard bind off tends to pull lace edges in, so a more elastic method is recommended.
Stretchy Bind Off: K2, insert left needle into the front of both stitches just worked, knit them together, K1, repeat from until one stitch remains. Cut yarn and pull through the last stitch to secure.
Finishing and Blocking
Blocking is the single most transformative step in any lace project, and it makes a dramatic difference with this blanket. Before blocking, lace often looks dense, slightly puckered, and hard to read. After blocking, the diamond shapes open up, the yarn overs become crisp and clear, and the whole blanket grows significantly in both width and length.
To wet block your blanket, soak it in cool water for 20 to 30 minutes until it is fully saturated. Gently squeeze out excess water (do not wring) and roll it in a clean towel to remove more moisture. Lay it flat on your blocking mats and stretch it gently to the finished dimensions, pinning the edges at regular intervals. Allow it to dry completely before unpinning, which may take 24 to 48 hours depending on your climate.
If you used a superwash yarn or a cotton blend, you can also wet block by spraying the finished piece heavily with a water mist bottle and smoothing it into shape by hand without pinning. This works well for less structured yarns that do not need aggressive opening of the lace.
Weave in all ends before blocking, as the moisture will help the yarn tails felt slightly into the fabric and become more secure.
Yarn Substitution Tips
The pattern calls for worsted weight yarn, but it works equally well in DK weight on a slightly smaller needle (US 6 or 7) for a finer, more delicate fabric with a smaller finished size. Bulky yarn is not recommended for this design because the lace detail gets lost in the thickness of the fabric and the drape becomes too heavy.
Avoid overly fuzzy or textured yarns like mohair blends or boucle, as the yarn over holes that define the diamond shapes will be obscured. The cleaner and smoother the yarn, the more clearly the lace design will show.
If you are gifting this blanket and are not sure of fiber preferences, a machine-washable merino such as Malabrigo Rios, Lion Brand Wool-Ease, or Paintbox Simply DK is a thoughtful choice that balances beauty with practicality.
Customization Ideas
One of the best things about this pattern is how easily it scales and adapts. Here are a few ideas to make it your own.
You can add a simple cable column between each diamond instead of a single knit stitch divider, turning the blanket into a hybrid lace and cable design that looks absolutely stunning in a heathered or tweed yarn.
You can work the blanket lengthwise instead of widthwise, casting on the full length of the blanket and working the five diamonds vertically. This changes the orientation of the diamonds and creates a portrait rather than landscape layout.
You can also stripe this blanket by changing colors every 20 rows at the end of each complete diamond repeat. Because lace has natural resting points at the beginning and end of each repeat, color changes integrate cleanly and the striped lace effect is striking.
For a monogrammed or gift version, consider working a single initial in simple duplicate stitch after blocking on one corner of the blanket using the border area as your canvas.
Caring for Your Finished Blanket
Always check the care label on your yarn before washing. Most wool and wool-blend lace blankets should be hand washed in cool water with a gentle wool wash and laid flat to dry. Machine washing on a delicate cycle in a mesh bag works well for superwash yarns. Cotton blankets can generally tolerate a gentle machine cycle in cool water.
Store your finished blanket folded (not rolled, which can distort the lace) in a breathable cotton bag or pillowcase. If you used natural animal fiber, adding a cedar block or lavender sachet to the storage container will protect against moths.
A Note on Lace Knitting for Beginners
If this is your first lace project, give yourself permission to go slowly. Work the first diamond repeat as a swatch before committing to the full blanket. Work through two or three full 20-row repeats and you will find the pattern becomes almost automatic, the kind of rhythmic work that lets your hands move while your mind wanders pleasantly.
Lace knitting rewards patience. When you hold up the blocked finished blanket and see the five clean diamonds stretching from edge to edge, the hours of careful attention will feel like exactly the right investment. That is the promise of lace: a small amount of learning translates into an object of real and lasting beauty.
Cast on with confidence, follow the pattern one row at a time, and enjoy every stitch.
