Sienna | Women's Classic Button Collar Cardigan
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Size Finder · Women
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Free shipping · Order today, arrives in 5–8 business days
- 90-day returnsPrintable return label by email
- Ships in 2–4 business daysTracked delivery in 3–4 days
- Real people, real answersEmail replies within a few hours
- Designed in the USAConsidered pieces, made to last
Meet Sienna, the cardigan that turns any outfit into an effortless statement. With its structured button-up collar and soft, relaxed knit, Sienna slips easily into your morning routine — whether layered over a tank for the office or worn open over a slip dress for weekend errands. It moves with you throughout the day, staying cozy without ever feeling bulky.
Why You Will Love It
- Structured shirt-style collar with polished button closures for a refined finish
- Soft, relaxed knit that feels gentle against the skin and warm without added weight
- Ribbed cuffs and hem for a comfortable, secure fit that holds its shape
- Versatile enough to dress up with trousers or down with denim
Tech Specs and Care
- Design: Button-up shirt collar, dropped shoulder long sleeves, ribbed cuffs and hem, relaxed drape through the body
- Fit: True to size with a relaxed, oversized silhouette — refer to the Size Chart for exact measurements
- Season: Ideal for fall, winter, and cool spring days, perfect for layering
- Care: Hand wash cold or gentle machine wash, lay flat to dry, avoid direct heat
Size Guide
Find your fit.
Our pieces follow standard US sizing. If you're between sizes, choose the larger size for outerwear and knitwear and your usual size for dresses. The Size Finder on every product page gives you a personal recommendation in seconds.
Women's clothing
| Size | US | Bust (in) | Waist (in) | Hips (in) |
|---|---|---|---|---|
| XS | 0–2 | 31–32 | 24–25 | 34–35 |
| S | 4–6 | 33–34 | 26–27 | 36–37 |
| M | 8–10 | 35–36 | 28–29 | 38–39 |
| L | 12–14 | 37.5–39 | 30.5–32 | 40.5–42 |
| XL | 16 | 40.5–42 | 33.5–35 | 43.5–45 |
| XXL | 18 | 43.5–45 | 36.5–38 | 46.5–48 |
Men's clothing
| Size | Chest (in) | Waist (in) | Neck (in) |
|---|---|---|---|
| S | 35–37 | 29–31 | 14–14.5 |
| M | 38–40 | 32–34 | 15–15.5 |
| L | 41–43 | 35–37 | 16–16.5 |
| XL | 44–46 | 38–40 | 17–17.5 |
| XXL | 47–49 | 41–43 | 18–18.5 |
Shoes
| Foot length (in) | Women US | Men US | EU |
|---|---|---|---|
| 9.0 | 6 | – | 36–37 |
| 9.4 | 7 | – | 37–38 |
| 9.7 | 8 | 6.5 | 38–39 |
| 10.0 | 9 | 7.5 | 40 |
| 10.3 | 10 | 8.5 | 41 |
| 10.6 | 11 | 9.5 | 42–43 |
| 11.0 | – | 10.5 | 44 |
| 11.3 | – | 11.5 | 45 |
| 11.7 | – | 12.5 | 46 |
Still unsure? Email info@fifthavenuestyle.com for personal sizing help.
Every piece is made from carefully selected materials. Please follow the care label inside the garment. As a rule of thumb: wash knitwear cold and dry it flat, and have tailored outerwear professionally dry cleaned to keep its shape for years.
Free US shipping on every order. Orders are processed within 2–4 business days, then delivered within 3–4 business days. You'll receive a tracking number by email as soon as your order ships.
90-day returns. Return unworn items in their original condition within 90 days of delivery. Email us and we'll send you a printable return label; the label cost is deducted from your refund, except for damaged, faulty or incorrect items. Full return policy
