Hackett London Size Guide
Hackett London embodies Great British sophistication and gentlemanly elegance, renowned for impeccable tailoring and distinctive style. The brand offers two primary fits across its collections: a Slim fit designed to flatter and follow the body's contours, and a Classic fit providing a relaxed silhouette with enhanced movement whilst maintaining a smart appearance. Hackett sizes are consistent across formal wear, casual shirts, polo shirts, knitwear, and outerwear, though fit preferences vary by garment type. Always check individual product pages for specific fit information and measurements, as these provide the most accurate guidance for your chosen style.
How to Measure
- Chest circumference: Measure around the fullest part of your chest, keeping the tape parallel to the ground and snug but not tight.
- Waist circumference: Measure around your natural waist (where your trousers typically sit), relaxed and straight.
- Sleeve length: With your arm slightly bent, measure from the centre back neck, across the shoulder, and down to your wrist bone.
- Shirt collar: Measure around your neck where a shirt collar would sit, allowing one finger to fit comfortably inside.
- Trouser waist: Measure the inside waistband of a well-fitting pair of trousers you already own.
- Trouser length: Measure the inside seam from crotch to ankle, or compare with an existing pair in your preferred length (Regular, Long, or X-Long).
Men's Casual Shirts (Classic Fit)
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Collar (inches) | 14.25 | 15 | 15.5 | 16 | 16.5 | 17 | 17.5 |
| Chest circumference (inches) | 42.5 | 44.5 | 46.5 | 47.75 | 49 | 51.25 | 52.5 |
| Waist circumference (inches) | 38.5 | 40.5 | 42.5 | 44 | 45.25 | 48 | 49.25 |
| Sleeve length (inches) | 25.5 | 26 | 26.5 | 26.5 | 26.75 | 27.25 | 27.5 |
| Back length (inches) | 30.25 | 30.75 | 31 | 31.5 | 32 | 32.25 | 33 |
Men's Casual Shirts (Slim Fit)
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Collar (inches) | 14.25 | 15 | 15.5 | 16 | 16.5 | 17 | 17.5 |
| Chest circumference (inches) | 39.75 | 41.75 | 43.75 | 47 | 50 | 53.25 | 56.25 |
| Waist circumference (inches) | 35 | 37 | 39 | 42.25 | 45.25 | 48.5 | 51.5 |
| Sleeve length (inches) | 25.25 | 25.5 | 26 | 26.5 | 26.75 | 27.25 | 27.5 |
| Back length (inches) | 29.5 | 30 | 30.25 | 30.75 | 31 | 31.5 | 32.25 |
Men's Polo Shirts (Tailored Fit)
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Chest circumference (inches) | 36.25 | 38.25 | 40.25 | 43.25 | 46.5 | 49.75 | 52 |
| Polo shirt length (inches) | 27 | 27.5 | 28 | 29 | 29.5 | 30 | 31 |
Men's Polo Shirts (Slim Fit)
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Chest circumference (inches) | 36.25 | 38.25 | 40.25 | 43.25 | 46.5 | 49.75 | 52 |
| Polo shirt length (inches) | 26 | 26.4 | 26.8 | 27.5 | 28.3 | 29 | 30 |
Men's Knitwear (Sweaters, Jumpers)
| Size | XS | S | M | L | XL | XXL | XXXL |
|---|---|---|---|---|---|---|---|
| Chest circumference (inches) | 38.5 | 40.5 | 42.5 | 45.75 | 49 | 52 | 55.25 |
| Back length (inches) | 25.25 | 25.5 | 26 | 26.75 | 27.5 | 28.5 | 29.25 |
| Sleeve length (inches) | 25.5 | 26 | 26.5 | 26.75 | 27.25 | 27.5 | 28 |
Men's Jackets & Blazers
| Size | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 |
|---|---|---|---|---|---|---|---|---|
| Chest (inches) | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 |
| Sleeve length (inches) | 24 | 24.4 | 25 | 25.2 | 25.5 | 26 | 26.4 | 26.6 |
Men's Casual Trousers & Jeans
| Size | 30 | 32 | 34 | 36 | 38 | 40 | 42 |
|---|---|---|---|---|---|---|---|
| Waist (inches) | 30 | 32 | 34 | 36 | 38 | 40 | 42 |
| Shorts (inside leg, inches) | 30 | ||||||
| Regular (inside leg, inches) | 32 | ||||||
| Long (inside leg, inches) | 34 | ||||||
| X-Long (inside leg, inches) | 36 | ||||||
Men's Formalwear & Tailored Shirts
| Shirt Size | 14 | 14.5 | 15 | 15.5 | 16 | 16.5 | 17 | 17.5 | 18 |
|---|---|---|---|---|---|---|---|---|---|
| Chest (inches) | 37.75 | 39.75 | 41.75 | 43.75 | 46 | 48.38 | 50.75 | 53.13 | 56 |
| Waist (inches) | 33 | 35 | 37 | 39 | 40.13 | 41.38 | 43.75 | 44.88 | 46 |
| Sleeve length (inches) | 24.75 | 25.25 | 25.63 | 26 | 26.13 | 26.38 | 26.75 | 27 | 27.5 |
| Back length (inches) | 29.13 | 29.5 | 30 | 30.38 | 30.5 | 30.75 | 31.13 | 31.25 | 31.87 |
Children's Sizes (2–16 years)
| Approximate Age | Height (cm) | Chest (cm) | Waist (cm) |
|---|---|---|---|
| 2 years | 92 | 52 | 49 |
| 3–4 years | 104 | 55.5 | 52 |
| 5–6 years | 116 | 60 | 55.5 |
| 7–8 years | 128 | 64 | 58 |
| 9–10 years | 140 | 69 | 62 |
| 11–12 years | 152 | 78.5 | 67 |
| 13–14 years | 164 | 86 | 74 |
| 15–16 years | 176 | 94 | 77 |
Children's Shoes (2–16 years)
| Approximate Age | EU | UK | US |
|---|---|---|---|
| 3 years | 25 | 8 | 9 |
| 3 years | 26 | 8.5 | 9.5 |
| 4 years | 27 | 9 | 10 |
| 5 years | 28 | 10 | 11 |
| 6 years | 29 | 11 | 12 |
| 7 years | 30 | 12 | 13 |
| 8 years | 31 | 12.5 | 13.5 |
| 8 years | 32 | 13 | 1 |
| 9 years | 33 | 1 | 2 |
| 10 years | 34 | 2 | 3 |
| 11 years | 35 | 2.5 | 3.5 |
| 12 years | 36 | 3 | 4 |
| 13 years | 37 | 4 | 5 |
| 14 years | 38 | 5 | 6 |
| 15 years | 39 | 6 | 7 |
| 16 years | 40 | 7 | 8 |
Product-Specific Guidance
Casual Shirts
Hackett casual shirts are offered in both Classic and Slim fits. The Classic fit provides a relaxed, traditional cut with more room through the chest and waist, ideal for layering or a more generous silhouette. The Slim fit is tailored to follow the body's lines more closely, creating a sharper contemporary appearance. When choosing between fits, consider your typical wear: Classic for casual weekend wear and comfort; Slim for a more defined, modern aesthetic. Always compare your collar measurement to the chart, as shirt fit is determined primarily by collar size.
Polo Shirts & Rugby Shirts
Hackett's heritage polo and rugby shirts are celebrated for their distinctive embroidery and bold colour palette. Both are available in Tailored (classic, relaxed fit) and Slim options. The Tailored fit offers a traditional, slightly generous cut; the Slim fit provides a contemporary, body-conscious silhouette. Chest circumference is the primary sizing measure for polos and rugby shirts. Note that the Slim fit will have a shorter overall length compared to the Tailored version in the same chest size.
Knitwear (Sweaters & Jumpers)
Hackett knitwear sizing is based on chest circumference and sleeve length. The brand's sweaters and jumpers maintain a structured, refined appearance whether worn layered under a blazer or as standalone pieces. Ensure the sleeve length reaches your wrist bone for optimal proportions. Hackett knitwear typically runs true to size, but if you prefer a closer fit, you may size down; conversely, for a relaxed, oversized aesthetic, consider sizing up.
Jackets & Blazers
Blazer sizing at Hackett is measured by chest circumference, with UK sizes ranging from 34 to 48 inches. The brand's tailoring emphasises a well-proportioned shoulder and sleeve length. Jacket fit is crucial for a polished appearance, so measure your chest and compare with actual garment measurements rather than relying solely on size labels. Sleeve length should end at your wrist bone without bunching; if you are between sizes, choose the larger size for comfort and consider tailoring the sleeves if necessary.
Trousers & Jeans
Hackett trousers and jeans are sized by waist measurement in inches (30 to 42) and offered in multiple inside-leg lengths: Shorts (30 inches), Regular (32 inches), Long (34 inches), and X-Long (36 inches). Choose your waist size based on where you naturally wear your trousers, and select the inseam length that allows the hem to sit just above your shoe without creasing excessively. If you find your regular length is between offerings, err toward the longer inseam; excess length can be tailored more easily than adding fabric.
Formalwear & Tailored Shirts
Hackett formalwear and tailored shirts are sized by collar measurement (ranging from size 14 to 18), with accompanying chest, waist, sleeve, and back-length data provided for each size. Collar fit is the most critical dimension; measure your neck carefully and allow one finger to fit comfortably inside. Back length and sleeve length ensure the shirt proportions suit your frame; if you are tall or have long arms, verify these measurements before ordering. Tailored shirts often require professional alteration for a perfect fit.
Sizing Tips
- Always measure an existing well-fitting garment in the style category you are purchasing. Comparing your measurements to the size chart provided on each product page is far more accurate than relying on size labels alone, as fit can vary subtly between collections.
- Fit preference matters. Hackett's Classic fit is true to traditional menswear sizing and allows room for layering; the Slim fit runs noticeably narrower. If you prefer a sharper, contemporary look, size down in Slim fits; if you value comfort and layering potential, opt for Classic.
- Sleeve length is frequently overlooked. Sleeves should end at or just above your wrist bone. Hackett provides detailed sleeve measurements in centimetres and inches; use these rather than guessing, as short sleeves look dated and overlength sleeves appear sloppy.
- Collar sizing for formal and casual shirts determines overall fit. A collar that is too tight will be uncomfortable and pull the shirt out of shape; too loose and the shirt will gape at the front. Measure your neck and add 1 cm (0.5 inches) for comfort when ordering formal wear.
- Trouser fit improves with tailoring. Purchase trousers based on your true waist measurement and desired inseam length, then have a tailor adjust the rise and taper if necessary. Hackett's classic cuts pair well with professional tailoring to achieve a bespoke fit without the price tag.
- Sizing varies slightly across product categories. A size M polo shirt may fit differently from a size M casual shirt due to differing construction and intended wear. Always refer to the specific product's size chart and fit description rather than assuming consistency across the entire brand range.
- Contact Hackett customer service if in doubt. The brand's official website and retailers provide comprehensive support. Asking for fit guidance specific to your build and preferences is always recommended before committing to a purchase, particularly for tailored items.