James C. Brett JB497 Sweater Jumper Knitting Pattern

James C. Brett JB497 Chunky Knit Sweater

What is Being Made

The James C. Brett JB497 is a chunky knit sweater designed for a comfortable, relaxed fit. This garment is available in six sizes, ranging from 71/76cm (28/30in) bust to 112/117cm (44/46in) bust, making it suitable for a wide range of body measurements. The sweater features a full length of 59–67cm (23¼–26½in) depending on size, with sleeve lengths ranging from 43–48cm (17–19in).

Techniques Used

This sweater is constructed using bottom-up seamed construction, meaning pieces are knitted individually from the lower edge upward and then joined together. The garment is worked flat on straight needles rather than in the round, allowing for straightforward shaping and a traditional seamed finish. This method is ideal for achieving clean, professional seams and provides excellent control over fit and measurements throughout the knitting process.

Stitches Used

The James C. Brett JB497 employs two primary stitch patterns:

• 1x1 Rib – Used for edgings and cuffs, this classic ribbed stitch alternates knit and purl stitches (K1, P1) to create elasticity and a neat, fitted finish at the wrists, waistband, and neckline.
• Stocking Stitch (St-St) – The main body fabric, created by alternating rows of knit stitches on the right side and purl stitches on the wrong side, producing the smooth, classic sweater appearance.

Materials and Specifications

This pattern calls for James C. Brett MarbleChunky yarn in the colorway MC77. Yarn requirements vary by size, ranging from 3 balls (200g each) for the smallest sizes to 4 balls for the largest size. The chunky weight yarn works quickly and creates a substantial, warm fabric.

Two pairs of knitting needles are required: a pair of 6mm (UK4/US10) needles for the main fabric and a pair of 5mm (UK6/US8) needles for ribbed sections. Stitch holders are also needed to manage stitches during construction.

Tension and Fit

Achieving the correct tension is essential for success. The pattern specifies 14 stitches and 20 rows to 10cm (4in) over stocking stitch using 6mm needles, and 13 stitches and 28 rows to 10cm (4in) over garter stitch using 6mm needles. Knitters should adjust needle size accordingly—using finer needles if stitch and row counts are too loose, or larger needles if too tight—to match the stated tension and ensure the finished sweater meets the intended measurements.