Berroco Porto Jumper Knitting Pattern

Berroco Porto Seamless Top-Down Lace Knit Sweater

What is Being Made

The Berroco Porto is an intermediate-level pullover sweater designed by Amy Christoffers. This garment features a seamless construction worked from the top down, offering six size options ranging from 37 inches to 71¼ inches in bust measurement. The finished lengths vary from 22¼ inches to 27½ inches, accommodating different proportions and style preferences. The sweater is shown in size 41½ inches with approximately 4–6 inches of positive ease for comfortable wear.

Construction and Techniques

Porto employs a seamless, top-down construction method that minimizes finishing work. The sweater begins at the yoke and is worked in the round using circular needles, eliminating the need for seaming. The pattern incorporates both worked-in-the-round and worked-flat sections strategically throughout the design.

Lace Work: The sweater features decorative lace panels that repeat over 22 rounds. The lace pattern alternates between knit rounds and patterned lace rounds, creating visual interest while maintaining structural integrity. This technique requires intermediate-level skill to execute the yarn-over and decrease sequences accurately.

Yoke Construction: The yoke is initiated using a 16-inch circular needle with smaller gauge needles, beginning with a ribbed cuff worked in k1, p1 ribbing for ¾ inch. This ribbed foundation provides stretch and shape retention at the neckline.

Stitches and Stitch Patterns

• Stockinette Stitch (St st): The primary fabric stitch, worked in the round to create a smooth, vertical-lined surface
• Ribbing (k1, p1): Used for the neckline cuff to provide elasticity and a finished appearance
• Lace Stitches: Yarn-overs and decreases create the repeating lace panel pattern across 22-round sequences, adding openwork detail and texture

Materials and Gauge

The Porto is knitted using Berroco Gaia yarn, a worsted-weight fiber requiring 9 to 20 balls depending on size selection (each ball weighs 50 grams). The yarn color used in the sample is #3021 River Stones.

Needles Required: The pattern calls for multiple needle sizes and styles to accommodate different sections. Knitters will need 32-inch circular needles in sizes 5 (3.75 mm) and 6 (4 mm) for the body, 16-inch circular needles in the same sizes for transitional sections, and one set of double-pointed needles or preferred small-circumference needles in both sizes for working the sleeves and finishing.

Gauge: The pattern specifies a gauge of 22 stitches and 32 rows per round measured over 4 inches in stockinette stitch on the larger needles, measured after blocking. Achieving accurate gauge is essential for proper fit across all six size options.

Additional Notions: The project requires six stitch markers in multiple colors for tracking pattern repeats and construction points, waste yarn for holding stitches during assembly, and a tapestry needle for weaving in ends.