How Garment Sizing Is Graded Across a Size Range

Grading is the systematic scaling of one base pattern up and down to create every other size in a range. It is almost never proportional in every dimension: chest and waist grow much faster than neck width or armhole depth, and one or two measurements barely move at all. That is why a 3XL is a differently shaped garment rather than a large enlarged on a photocopier, and why print placement should be measured from a fixed seam instead of centred on the garment.

The Grade Starts From One Fitted Size

Every range begins with a base size, often a medium in menswear. That pattern is the one that gets drafted properly, fitted on a body or a stand, adjusted and signed off. Everything else in the range is derived from it by applying a set of increments called grade rules. This matters because any compromise baked into the base size travels outwards in both directions, and it gets worse the further you go. A slightly short body length on the medium becomes a noticeably cropped 3XL.

Why the Increments Are Not Equal

A grade rule assigns a movement to each point on the pattern. Chest width might step up generously between sizes while the neck opening moves by a fraction of that. This is not laziness. It reflects how bodies actually differ: people who need a larger chest are not uniformly larger everywhere, and arm length varies far less than girth.

Body length catches buyers out most often. Many ranges add length steadily through the middle sizes and then slow down or stop at the top end, on the reasoning that a 3XL customer is more likely to be broader than taller. Larger sizes therefore get proportionally wider and shorter, which is the look people complain about when they say a big size sits like a box.

Reading a Size Chart Properly

Most published charts give you the finished garment measurements, not body measurements, though a few give the body and expect you to add ease yourself. Confirm which you are looking at before you compare two suppliers.

• Check whether chest is given as a full circumference or a half measurement taken flat across the garment, because a 55cm figure means two very different products depending on the answer.
• Look at how much body length changes between the top three sizes. If it stops moving, expect the biggest sizes to read as cropped on tall wearers.
• Compare sleeve length increments against body length increments; ranges that grow the sleeve faster than the body tend to fit broad, shorter builds well.
• Note whether the chart lists a tolerance at all. A chart without one is quietly assuming you will not measure.
• If you are ordering for a mixed group, get the chart in centimetres and circulate it rather than relying on the letter on the label.

What Grading Does to Your Artwork

Here is the practical consequence that costs people money. If you brief a print as sitting in the middle of the chest, the operator has to decide what middle means on each size, and the honest answer is that it moves. The reliable approach is to specify placement from a fixed anchor point, almost always the high point of the shoulder seam, and to keep that distance constant across the range.

A design measured down from the shoulder will look consistent on every wearer, because that is where the eye reads it from. A design measured up from the hem will drift, because the hem is the point that moved most during grading. Large back prints are the worst offender: the same artwork positioned by eye can end up sitting handsomely on a medium and sliding towards the waistband on a 2XL.

“"A size chart is a record of decisions somebody made about how bodies change. Read it before you assume your logo lands in the same place on all of them."”

Print Size Versus Print Position

There is a second question once placement is settled: does the artwork itself scale? For most orders it should not. One print size across the whole range keeps things simple, and a chest logo that suits a medium still reads well on a 2XL. Full-width front or back graphics are the exception. A graphic sized to fill a small will look modest on a 3XL, and one sized for a 3XL will run off the seams on a small. If the design is edge to edge, plan on at least two artwork sizes and tell your supplier which sizes get which.

Embroidery has less flexibility. A stitched logo is produced from a digitised file at a set dimension, and changing size means re-digitising, not just resizing. Most buyers run one embroidery size across the range and simply confirm that it clears the placket and the shoulder seam on the smallest garment ordered.

Ordering a Mixed Size Run

Velocity Wear works from a minimum of 20 pieces per order with sizes mixed freely inside that run, so you are not forced to buy 20 of each size to cover a varied team. That flexibility only helps if your size split is realistic, and the most common mistake is ordering by what people say rather than by what a chart says. Circulate the measurements, ask people to check a garment they already own, and collect the answers before the order goes in.

You can preview your design on the garment in the free Design Studio and check live pricing in the instant calculator as you change garment, method and quantity. Bulk discounts reach up to around 40% as quantities rise, production starts at artwork approval rather than order placement, and UK tracked delivery is typically 2 to 5 working days after dispatch.