Join free

Blazers & Tailoring

A blazer's shoulder seam is the fit point sizing up or down genuinely cannot fix, the same rule that governs any structured jacket: a shoulder cut too narrow pulls and restricts arm movement regardless of size, and sizing up only adds room through the chest and body, not the shoulder itself. It's the single measurement worth checking before anything else on a tailored piece.

Fabric composition changes how a "slim fit" actually performs on the body. A blazer with a percentage of elastane or stretch fibre in an otherwise structured wool or wool-blend fabric moves with the body and tolerates a closer fit comfortably; the identical cut in a fully rigid suiting fabric needs more built-in ease at the same size to move the same way. The fabric composition line is worth reading alongside the fit name.

Jacket length relative to torso length matters more here than in casual outerwear, because a blazer is meant to hit at a specific point (often near the base of the hip) for the tailored silhouette to read correctly — a jacket that's the right chest size but cut long or short for your torso will look proportionally off in a way sizing up or down won't correct.

Blazers & Tailoring at retailers

Keep exploring

Read the fit & style guides