Sienna Jacket - Crochet Pattern For Women in MillaMia Naturally Soft Merino by MillaMIa

Sienna Jacket – Crochet Pattern for Women in MillaMia Naturally Soft Merino

The Sienna Jacket is an intermediate-level women's crochet jacket pattern designed by MillaMia, worked in their signature MillaMia Naturally Soft Merino yarn. The design is described as delightfully Nordic in its primary blue and white colour combination, though it translates equally well into stronger, more vibrant colour choices. This is a downloadable PDF pattern offering a structured, seamed garment with a polished, wearable finish suitable for crocheters who are ready to move beyond beginner projects.

What Is Being Made

The Sienna Jacket is a women's fitted crochet jacket available in seven sizes, designed to fit chest measurements ranging from 81–86 cm (32–34 in) up to 142–147 cm (56–58 in). The finished chest measurements span from 101 cm (39¾ in) to 162 cm (63¾ in), providing generous ease across the size range. The garment includes sleeves, with sleeve lengths ranging from 38 cm to 42 cm (15 in to 16½ in) depending on size, and a back neck length ranging from 56 cm to 68 cm (22 in to 26¾ in). The sample model wears the second size and is a UK 10 (US 8), standing 173 cm (5'8") tall.

Techniques Used

• Worked flat: The Sienna Jacket is constructed by working the individual pieces flat, meaning each section — such as the front, back, and sleeves — is crocheted in rows rather than in the round.
• Seamed construction: Once all pieces are complete, they are joined together using seaming, a technique that creates neat, structured seams and gives the jacket a tailored, garment-quality finish. Seaming in crochet is typically done by sewing pieces together with a yarn needle, and the pattern uses the UK term join (equivalent to sew in US terminology).
• Two-colour work: The pattern is worked using two contrasting colours — in the main colourway, Mist 164 (Colour A) and Ice 125 (Colour B) — suggesting stranded or intarsia-style colour changes consistent with the Nordic aesthetic described.
• Stitch markers: Two stitch markers are required, indicating the pattern involves shaping or placement points that need to be tracked during construction.

Stitches Used

The Sienna Jacket uses a combination of standard crochet stitches. The pattern provides both UK and US terminology for clarity:

• Double crochet (UK) / Single crochet (US) — dc/sc: A short, dense stitch that creates a firm, structured fabric well suited to outerwear.
• Half treble crochet (UK) / Half double crochet (US) — htr/hdc: A mid-height stitch that adds a slightly looser, more flexible texture to the fabric.
• Treble crochet (UK) / Double crochet (US) — tr/dc: A taller stitch that creates an open, airy quality and is commonly used in decorative stitch patterns.
• Chain (ch): Used for turning chains, foundation rows, and any openwork elements within the stitch pattern.
• Slip stitch (ss): Typically used for joining, finishing edges, or moving across stitches without adding height.

The overall stitch pattern is worked at a tension of 22 stitches and 16 rows to 10 cm / 4 in, which is a relatively firm gauge consistent with the sport-weight yarn and 3mm hook used. Achieving correct tension is particularly important in a seamed, fitted garment like this jacket, as even small variations can significantly affect the finished measurements.

Materials Required

Yarn

The pattern calls for MillaMia Naturally Soft Merino, a sport-weight yarn sold in 50g / 1¾ oz balls. This yarn is a 100% merino wool known for its softness, stitch definition, and s