Sweater in Sirdar Sylvan - 7509 - Downloadable PDF

Sirdar Sylvan Chunky Sweater – Crochet Pattern 7509

This downloadable PDF from Sirdar provides a complete crochet pattern for a classic long-sleeved sweater worked in Sirdar Sylvan Chunky yarn. Designed with an inclusive size range, the pattern covers six sizes to fit bust measurements from 81/86 cm (32/34 in) up to 132/137 cm (52/54 in), making it a genuinely versatile choice for a wide range of crocheters. The actual finished garment measurements run from 89 cm (35 in) to 141 cm (55½ in) across the chest, offering a comfortable, relaxed fit with positive ease built in.

About the Garment

The finished design is a long-sleeved sweater — a wardrobe-staple pullover that works beautifully in a chunky weight yarn. Full lengths range from 60 cm (23¾ in) to 73 cm (28¾ in) depending on size, and sleeve lengths are given as approximately 46–48 cm (18–19 in), noted as adjustable so you can customise the fit to your arm length. The combination of a generous body length and full-length sleeves makes this a cosy, substantial garment ideal for cooler seasons.

Techniques and Construction

This is a crochet pattern — not knitting — so all construction is worked with a crochet hook rather than knitting needles. Crochet sweaters of this style are typically constructed by working the back and front panels flat and then seaming them together, with sleeves either worked flat and set in or worked in the round, though the specific construction sequence is detailed within the full PDF. The chunky yarn weight means the fabric grows quickly, making this an excellent project for intermediate crocheters who want a satisfying, fast make.

Stitches Used

• Treble crochet — the primary stitch used throughout the main fabric of the sweater. The tension specification is set over treble crochet, confirming it forms the dominant stitch pattern.
• Foundation and turning chains are used as standard in flat crochet construction.

Treble crochet (known as double crochet in US terminology) creates a tall, open stitch that produces a slightly drapey, flexible fabric — well suited to a wearable garment. Working consistently in treble crochet across the body gives the sweater a clean, textured appearance with a rhythmic, straightforward repeat that is easy to maintain across larger stitch counts.

Tension

The stated tension is 11 stitches and 6 rows to 10 cm (4 in) measured over treble crochet using a 6.50 mm hook (UK 3 / US K/10.5). Achieving the correct tension is described in the pattern as essential — working too loosely will require moving down to a thinner hook, while working too tightly will require a thicker hook. Always work a tension swatch before beginning to ensure your finished measurements match those given.

Materials Required

• Yarn: Sirdar Sylvan Chunky in shade 204 (colourway F051). The number of 50 g balls required ranges from 11 balls for the two smallest sizes up to 16 balls for the largest size (132/137 cm).
• Hook: One 6.50 mm crochet hook (UK size 3 / US size K/10.5).
• The pattern also notes that Sirdar Click Chunky and Sirdar Ophelia are suitable yarn substitutes, though yarn amounts may vary when substituting.

Yarn Details

Sirdar Sylvan Chunky is a chunky weight yarn, placing it in the heavier end of the standard yarn weight categories. Chunky yarns work up quickly on larger hooks and produce a warm, substantial fabric with excellent stitch definition — ideal for cosy sweaters and cold-weather garments. The yarn is sold in 50 g balls, and the quantities needed scale sensibly with size, from 11 balls at the lower end to 16 balls for the largest size.

Pattern Format