Men's grey blazers

Men's grey blazers from Hackett London bring together Savile Row construction and modern British tailoring in a shade that earns its place across every occasion — from a City boardroom to a long Saturday in Chelsea.

Construction and cut: what sets a grey blazer apart

The difference between a grey blazer that works and one that merely fits starts at the interlining. Hackett London builds its higher-grade men's grey blazers with a floating canvas — a technique drawn from traditional bespoke tailoring that allows the outer fabric to move with the body rather than resist it. Over time, the cloth moulds gently to the wearer's chest, creating a drape that fused interlinings simply cannot replicate. Shoulders are cut naturally, with no padding excess, so the silhouette reads as relaxed and considered rather than constructed.

The range spans slim fit to regular fit. The slim cut is best suited to a proportionate frame and carries a closer chest and tapered sleeve; the regular offers more room across the shoulders and a straighter fall from torso to hem, making it the sounder choice for layering a fine-knit merino wool underneath without pulling across the back. Both cuts share the same quality of construction — the distinction is entirely in the pattern.

Fabric and texture across the grey blazer range

Men's grey blazers in the Hackett London collection work through several cloth weights, each suited to a different season and situation. Midweight wool — 100% wool in charcoal and mid-grey, typically around 260–280g/m² — provides enough structure for formal contexts while breathing well enough to carry through a full working week. Flannel in a brushed finish softens the appearance slightly, giving a matte, low-sheen surface that photographs well and reads as effortlessly authoritative in person. For transitional months, wool-linen blends at a lighter weight reduce bulk without sacrificing the clean shoulder line that defines the Hackett silhouette.

Grey as a category within the range covers significant ground: pale dove grey in fine-tweed weave sits alongside mid-slate in plain weave and deep charcoal in a herringbone construction that adds surface interest without breaking from the formal register. The interior finishing — viscose or silk lining, structured welt pockets, functioning button cuffs on the better models — reflects the kind of detail that becomes visible only once you wear the jacket regularly.

How to wear men's grey blazers from Hackett

The staying power of men's grey blazers in heavy rotation comes down to their chromatic neutrality. Grey sits cleanly against navy, off-white, camel, burgundy and olive without the contrast risks that come with tan or brown. Two directions that work without trying:

Charcoal grey blazer in 100% wool over a pale blue Jermyn Street-collar shirt, mid-grey flannel trousers and dark Oxford shoes — the right kind of quiet for a meeting that matters.
The same blazer worn open over a navy crewneck in merino, slim dark-wash denim and a clean white trainer: the formality drops, the structure remains, and the result reads as intentional rather than effortful.

Hackett London, founded in 1983 with a philosophy rooted in British dressed-for-purpose tailoring, built much of its identity on exactly this kind of crossover — a slim-fit grey blazer that functions at Ascot in the afternoon and at a Pall Mall dinner the same evening without requiring a change of jacket.

Choosing the right size in Hackett grey blazers

Men's grey blazers from Hackett London follow standard European sizing. Pure wool models carry a little more body when new and adapt to the wearer's shape after several wears; if you sit between two sizes in wool, size down for the slim fit. Models in wool-linen or technical blends have more immediate give and tend to run true to size. Standard sleeve length is calibrated for a height between 178 and 182 cm; taller frames will find the regular fit accommodates alterations more cleanly, as the seam allowance at the cuff is preserved. Chest sizing runs true to Hackett's broader menswear sizing — a 40-inch chest in a suit translates directly to a size 50 in the blazer range.

What fabrics are Hackett men's grey blazers made from?

Hackett London's men's grey blazers are made primarily from pure wool, wool-flannel and wool-linen blends, with composition varying by model and season. Core tailoring models use 100% wool in midweights of around 260–280g/m²; lighter transitional options introduce linen to reduce weight while maintaining structure. Composition is listed on the product page of each model and on the care label inside the jacket.

How should I care for a wool grey blazer from Hackett?

Dry cleaning is the recommended method for all wool and flannel men's grey blazers from Hackett London. Between cleans, hang the blazer on a wide wooden hanger for at least an hour after wearing — wool recovers its shape naturally when given space and air. Avoid the washing machine on any model with floating canvas interlining, as water and heat cause the shell and lining to shrink at different rates, distorting the chest permanently. For small marks, a cool damp cloth applied without rubbing will lift most surface soiling without affecting the cloth's finish.

Can a grey blazer be worn as part of a suit or only separately?

Most men's grey blazers in the Hackett London range are designed as odd jackets — separates intended to be combined freely with trousers of a different cloth, colour or texture. Wearing a blazer with a matching trouser cut from the same roll of fabric produces a suit; Hackett's dedicated suit range covers this in a separate category. Mixing a grey blazer with flannel trousers in a lighter or darker shade, or with a chino in camel or stone, is the more considered approach and the one the collection is genuinely built for.

What is the difference between a grey blazer and a grey suit jacket?

A grey suit jacket is cut from the same fabric as its matching trousers and is intended to be worn as a set; wearing it without the corresponding trouser reads as incomplete. A grey blazer is a standalone garment, typically in a cloth, texture or construction — herringbone, tweed, patch pockets, brass or horn buttons — that signals it is designed to be mixed. Hackett London's men's grey blazers use details such as contrast stitching, structured patch pockets and non-matching buttons to mark them clearly as separates, giving them considerably more flexibility across a working wardrobe.