When buying textiles, sizing is one of the most common areas where things go wrong. A product can look good, feel good and be priced correctly — but if the sizing is wrong, it may not be suitable for the intended market.
Many factories work from their own standard size charts. These may be based on their domestic market, another export market, or a generic production template. That means a "Large" from one factory may not match a "Large" in the UK, Europe or the US. In some cases, an XL can feel more like a Medium, simply because the buyer assumed the size label meant the same thing.
This issue affects both small buyers and large organisations. It is not just a beginner mistake. Even experienced companies receive goods that are technically well made but commercially unusable because the fit is wrong.
The core problem
The risk is assuming that size labels are universal. They are not.
A factory may offer a T-shirt from Small Youth through to 5XL, but unless the buyer understands the measurements, grading and intended fit, there is no guarantee that the finished product will match the end customer's expectations.
Key risks
Different market sizing
Asian, European, UK and US sizing can vary significantly
Incorrect assumptions
Buyer orders "XL" expecting UK XL, but receives a much smaller fit
Poor grading
Smaller sizes may work, but larger sizes may not scale correctly
No fit approval
Product goes into bulk production before anyone has checked the real fit
Wrong garment type
Slim fit, regular fit, relaxed fit and oversized fit can all be interpreted differently
Label confusion
The label may say the right size, but the actual garment measurements may be wrong
Returns and complaints
Product may be rejected by the buyer or end user
Brand damage
Poor fit can make the product feel low quality, even if manufacturing is acceptable
Why factory size charts are not enough
A factory size guide is only useful if it is checked against the buyer's intended market. For example, a factory may produce a "standard adult XL", but that standard may be based on local retail sizing. If the buyer is selling or distributing in the UK, that XL may not match what a UK customer expects.
This becomes even more important when buying across a wide size range — Small Youth to 5XL, women's fitted, unisex, workwear, sportswear, promotional event clothing. The wider the size range, the more important the grading becomes. One sample size fitting correctly is not enough; the buyer needs confidence that each size has been scaled properly.
What buyers should do before ordering
Fit samples are essential
A fit sample is not a formality. It is one of the most important approval stages in textile sourcing. Physically check the garment, compare it against the approved size chart and, where possible, test it on the intended wearer profile. This is especially important for uniforms, sportswear, staff clothing, event merchandise and retail apparel.
Skipping this stage to save time or cost creates much larger problems later. A £3 T-shirt is not good value if the finished product does not fit the people it was bought for.
The Viaty view
Sizing should be treated as a technical specification, not just a label. The correct approach is to define the size requirement before production, agree the measurements with the factory, approve samples and build size checks into the quality control process.
The question is not simply: "Can the factory make this T-shirt in XL?"
The better question is: "Can the factory make this T-shirt in an XL that fits our market, our customer and our intended use?"
That distinction is where many sourcing problems begin.