US Sizing: What American Customers Expect a Medium to Be
By The Velocity Wear Team
Sizing is not a standard. There is no authority that defines an American medium, which means every brand defines its own and customers navigate by experience. The practical consequence for a new brand selling into the US is that your size chart is a promise, and if it does not match what your customers have learned to expect, the mismatch comes back to you as returns.
The direction of the difference
Broadly, US sizing runs generous relative to UK and EU equivalents at the same letter. A garment cut to a UK medium will often be worn as a small by an American buyer of the same build. It is not a rule you can apply arithmetically, and it varies by category and by brand — but the direction is consistent enough that a brand importing a size chart from a European tech pack and selling into the US should expect complaints that everything runs small.
The fix is not to relabel. It is to publish measurements.
Publish flat measurements, always
Chest width laid flat, body length from the high point of the shoulder, sleeve length, and for hoodies and sweats the shoulder width. Four numbers per size, in inches for a US audience, and the ambiguity mostly disappears. A customer who can compare your numbers against a garment they already own does not need to guess what your medium means.
This is the single highest-return-on-effort thing a small apparel brand can do about fit. It costs one measuring session with your samples and it removes the most common reason for a size exchange.
Grading: the jumps between sizes
A size run is not one garment scaled up. Grading is the set of rules describing how each measurement changes between sizes, and the jumps are not all equal — chest typically grows by a consistent increment through the middle sizes and often more at the extremes, while body length grows more slowly.
For a first order you are almost certainly buying a blank with an established grade rather than cutting your own pattern, so this is a specification you inherit. What you need from it is the measurement table, so you can publish it. Ask for it at sample stage.
Where the US market is genuinely different
- Oversized is a fit, not an accident. US streetwear buyers frequently size up deliberately, so a boxy body with a dropped shoulder is a design decision to make explicitly rather than something to correct.
- Extended sizes carry more weight commercially. A range that stops at XL reads as incomplete to a broader US audience in a way it does not everywhere.
- Inches, not centimetres. Publishing a chart in cm to a US audience adds friction for no benefit.
- Tall sizing exists as a genuine category and is under-served by small brands. It is not a first-order problem, but it is worth knowing the demand is there.
How this shapes a first order
Get a size set before bulk — one garment in each of the sizes you plan to sell, not just a sample in your own size. It is the only way to check the grade behaves sensibly across the range and that your XXL is not just an XL with longer sleeves.
Then weight the buy. Mixed sizes are included inside our 20-piece minimum per design, so a first run can carry a realistic curve rather than an even split, and you can adjust the curve on the reorder once you have actual sell-through instead of a guess.
