Blazer Size Chart

What a blazer size chart covers

A blazer size chart turns body measurements into a starting size letter. Most general charts list chest first, because chest is the main measurement for a blazer, then waist, shoulder width and sleeve length in the same row. Reading the full row matters, because a size that matches your chest may still be wrong at the shoulders or sleeves, and those two points are harder to fix than the waist.

The chart on this page gives broad adult ranges in inches from XS to XXL. It is a general guide for comparing sizes, not a promise that every blazer labelled M will fit the same way. Brands grade their sizes differently and cut for different shoulder widths, so use the chart to find a starting size and then check the brand chart for the blazer you are buying.

Reading the chest and waist rows

Start with your chest measurement, taken around the fullest part with the tape level and your arms relaxed. Find the row where your chest falls, then check your waist against the same row. If your chest and waist fall in different rows, start with the row that matches the larger of the two, because a blazer must fit the widest area that affects it.

Chest ranges in the chart step by about two inches per size, which is why many people fall near a boundary between two sizes. If your chest sits exactly on a boundary, the fit and fabric of the blazer decide the choice. A fitted style or a firm fabric usually points to the larger size, while a relaxed style with stretch may let you take the smaller one.

Shoulder, sleeve and back length columns

Shoulder width is the most important secondary measurement, because shoulders are the hardest part of a blazer to alter. Measure from one shoulder edge to the other across the back and compare it with the shoulder range in your row. If your shoulders are wider than the row suggests, consider the next size up or a cut made for broader shoulders, even if your chest fits the smaller size.

Sleeve length and back length decide where the blazer ends. Sleeve ranges in the chart run from about 32 inches at XS to about 38 inches at XXL, and back length runs from about 27 to 33 inches. If you are tall or short, check these two numbers closely, because a size letter that fits your chest can still leave sleeves that are too long or a hem that sits too high.

When the chart is not enough

A general chart cannot cover every body. If your chest is below 34 inches or above 48 inches, the chart can only point to the nearest end as a rough guide. In that case, rely on the brand chart and the stated garment measurements, especially shoulder width and sleeve length, which decide fit more than the size letter at the extremes.

The chart also cannot show how a particular blazer is cut. A single breasted blazer, a double breasted blazer and an unstructured blazer in the same size can fit very differently, because the double breasted style overlaps more fabric at the front and the unstructured style has less padding at the shoulder. Read the fit notes with the chart before you order.

General blazer size chart

The chart below gives broad adult chest, waist, shoulder and sleeve ranges in inches. Treat these as starting ranges, not as brand sizes. Always check the brand chart for the blazer you are buying.

If your measurements fall below XS or above XXL, use the nearest end of the chart as a rough guide and rely on the brand chart and the stated garment measurements instead.