XXXXL Shirt & Jersey Size Chart (Chest, Neck, Sleeve)

XXXL/XXXXL dress and casual shirt size chart

These are general reference measurements for men's dress shirts and structured casual shirts (button-downs, oxford shirts). Chest is measured the same way as the homepage's general chart; neck and sleeve add the two other numbers most shirt-specific size guides list.

If you're comparing this against a T-shirt or polo instead of a structured dress shirt, use chest measurement as the primary number and treat neck/sleeve as a secondary check, since knit tops fit more forgivingly around the collar than a woven, buttoned shirt does.

How to measure neck and sleeve length

Neck and sleeve are the two measurements people get wrong most often when buying a dress shirt online, mostly because they're measured differently from how a shirt collar feels once it's on.

• Neck: wrap the tape around the base of your neck, where a buttoned collar would sit, and add half an inch for comfortable movement rather than measuring dead tight.
• Sleeve: start at the centre back of your neck, run the tape across the shoulder, down the outside of the arm, past a slightly bent elbow, to the wrist bone. This is the single most commonly mismeasured number on this page.
• If your neck and chest measurements point to two different size rows in the table, prioritise the chest number for an off-the-rack shirt (fit through the body matters more day to day) and consider a shirt described as "tall" or with adjustable cuffs if the sleeve length alone is the outlier.

XXXXL jersey and athletic-fit sizing (why it runs differently)

Sports jerseys, whether for basketball, football, cycling or general athletic wear, are cut for movement, and often for wearing over a base layer, so a jersey's XXXL or XXXXL frequently has more room through the chest and shoulders than a dress shirt at the same label. Some brands compensate by running athletic sizing a size smaller than casual wear (a compression or fitted-cut jersey), while others run larger to leave room to layer, so this is one of the categories where checking the specific product's own measurements matters most.

As a starting point, use the general chest range in the XXXL & XXXXL size chart and add roughly an inch of ease for a standard team-style jersey, or subtract an inch for a compression/fitted athletic cut. If the product page lists its own chest measurement (rather than just a size letter), always use that over any general chart.

China and Japan equivalents for shirts

The same general pattern from the main size chart applies to shirts specifically: a China-based retailer's printed XL or 3XL label commonly fits one to two sizes smaller than the equivalent US/UK shirt, so sizing up is the safer default when a specific chest measurement isn't listed on the product page. Japanese shirt sizing follows the L-multiple convention (LL, 3L, 4L and up), and dress shirts in particular can run narrower through the shoulders than the chest number alone would suggest, since Japanese shirt patterns are often cut for a slimmer overall silhouette.

Shopping for a women's-specific top instead of a men's/unisex shirt? See the women's plus-size chart for the numeric-to-letter breakdown. Nothing on this page is stored or transmitted anywhere, it's a static reference chart, see the privacy policy for details.