Looking for a lace knit cotton summer vest pattern that feels airy and looks rustic? This design uses a natural fiber blend of cotton, silk — perfect for hot days when you want coverage without overheating. The openwork stitch creates a beautiful texture while keeping the garment lightweight. Below you’ll find a complete professional instruction in US knitting terms, from casting on to finishing.
Sizes: S/M (M/L) L/XL
What You’ll Need for This Lightweight Summer Top
- Yarn: (60% cotton, 40% silk; 50 g / 135 m) — 8 (9) 10 skeins in sand color.
- Circular needles: US 2.5 (3 mm), 24″ (60 cm) long.
- Circular needles: US 6 (4 mm), 32″ (80 cm) long.
✅ The vest is knit flat (back and forth) on circular needles.
Stitch Patterns
Ribbing
Alternately P2, K2 (Row 1 = WS).
Lace / Openwork Pattern
Multiple of 13 sts + 2 sts.
⚠️ Important: In Row 4, when working 5 sts with a triple yarn over, the first stitch must always be knit. Otherwise, the pattern becomes uneven.
Row 1 (RS): K1, K2tog, K9, slip 1, knit next st, pass slipped st over (psso), repeat from * to *, end with K1.
Row 2 (WS): P1, slip both sts to right needle, twist them, return to left needle one by one, then p2tog through back loops, P7, p2tog through back loops, repeat from * to *, end with P1.
Row 3 (RS): K1, K2tog, K2, triple yarn over (yo × 3), K3, slip 1, knit next st, psso, repeat from * to *, end with K1.
Row 4 (WS): P1, slip both sts to right needle, twist, return to left needle one by one, then p2tog through back loops, P2, then work from triple yo: (K1, P1, K1, P1, K1), P1, p2tog through back loops, repeat from * to *, end with P1.
Row 5 (RS): K1, K2tog, K6, slip 1, knit next st, psso, repeat from * to *, end with K1.
Row 6 (WS): P1, slip both sts to right needle, twist, return to left needle, then p2tog through back loops, P6, repeat from * to *, end with P1.
Row 7 (RS): K1, K1, (yo, K1) — do this 6 times, repeat from * to *, end with K1.
Row 8 (WS): Purl all sts.
Repeat rows 1–8 to end.
⚠️ Important: Count your stitches only on Row 8. The lace repeat width = approximately 1.5″ (4 cm) × 1.25″ (3 cm) height on US 6 (4 mm) needles.
Gauge Swatch (Do This First!)
Your gauge must match exactly. Before starting, knit a swatch:
- Cast on 28 sts.
- Work the lace pattern for 5.5″ (14 cm) using US 6 (4 mm) needles.
- Measure the center 4″ (10 cm) width of your swatch.
- ✅ If you have more than 24 sts → switch to larger needles.
- ✅ If you have fewer than 24 sts → switch to smaller needles.
Use the same needles for the vest as you used for the swatch.
Back Panel
Using US 6 (4 mm) circular needles, cast on 226 (250) 274 sts.
Bottom ribbing:
- Work in ribbing (P2, K2) for 8 rows (Row 1 = WS).
- Then work 3 rows in purl all sts.
Now begin the lace pattern (see Rows 1–8 above).
⚠️ Adjust stitch count on Row 1 (WS): Decrease evenly to 210 (236) 262 sts.
Continue until back measures approximately 24″ (61 cm), 25″ (64 cm), or 26.5″ (67 cm) — finish on Row 8.
Neck shaping:
- On the center 6 lace repeats, begin neck shaping.
- Bind off the center 2 repeats.
- Work each side separately.
- For neck rounding: bind off ½ repeat at the beginning of every 3rd row from the neck edge.
- Shoulder = 5 (6) 7 repeats. Bind off shoulder sts when one stitch remains — work that stitch as an edge stitch.
Front Panel (Deeper Neck)
Work exactly like the back, but with a deeper neckline.
- When approximately 4.5–5.5″ (12–14 cm) remain to final length, begin neck shaping.
- Bind off for rounding the same way as for back.
- Continue until shoulder length matches back, then bind off shoulder sts.
Finishing Your Openwork Knit Vest
Shoulder Seams
Sew shoulder seams approximately 8″ (20 cm), 9.5″ (24 cm), or 11″ (28 cm) long using mattress stitch.
Armhole Bands
- From each shoulder seam, count down 79 (87) 95 rows on both sides. Place markers.
- Using US 2.5 (3 mm) circular needles, pick up stitches along the edge between markers:
- 1 stitch from each row, skipping every 6th row.
- Stitch count must be multiple of 4 + 2.
- Work 2 rows purl, then work ribbing (P2, K2) back and forth for 7 rows.
- Bind off loosely.
- Sew armhole bands closed, then sew side seams.
Neckband
Using US 2.5 (3 mm) circular needles, pick up stitches along neckline from the RS:
- Start at right shoulder seam.
- Pick up 1 stitch from each row along back neck slope.
- Pick up 1 stitch from each bind-off stitch.
- On straight front sections: pick up 1 stitch from each row, skipping every 6th row.
- Total stitch count must be multiple of 4.
Neckband knitting (in the round):
- Row 1: Purl all.
- Row 2: Knit all.
- Rows 3–7: Ribbing (K2, P2) in the round.
- Bind off loosely.
Final Result
This lace knit cotton summer vest pattern gives you a breathable, rustic, effortlessly elegant garment for the hottest days. The natural fiber blend (cotton, silk) feels amazing against the skin and drapes beautifully. Whether you wear it over a tank or a linen dress, a lace knit cotton summer vest pattern like this will become your go-to warm-weather layering piece.
