When the medium sample fits and the XL does not, first separate three possibilities: the XL was made outside the specification, the specification’s grade does not suit the intended bodies, or a material or construction difference changed the fit. Correcting the grade before checking those possibilities can turn a sample-making error into a permanent pattern change.
Grading applies changes between sizes to a base pattern. Those changes need to work together across the garment, not simply add one amount to every dimension. The following review helps a buyer locate the problem, issue a precise correction and define what must be checked again before bulk.
Confirm that the samples are comparable
Identify the pattern and specification revision for both sizes. Confirm the fabric reference, finishing, trims, sewing construction and sample condition. A medium in one knit and an XL in another cannot isolate grading as the cause of a different drape or stretch response.
Remeasure both garments using the same points and method. Clarify flat widths versus circumferences, relaxed versus stretched dimensions, and new versus washed condition. Compare the actual values with the current target and tolerance before comparing one size with another.
If the XL is outside its existing specification, investigate that discrepancy first. If it meets the specification but fits badly on the intended body profile, examine the specification and pattern together. More than one cause can be present.
Request the full grade, not just the medium and XL columns
Ask for every point of measure across the size range and the increment between adjacent sizes. Include intermediate sizes: a problem seen at XL may begin with the M-to-L step rather than the L-to-XL step.
Review related areas together. Chest growth should be considered alongside shoulder, armhole, sleeve width and body length. On a hoodie, include hood height and opening rather than assuming the same hood suits every size. On a bottom, review waist, hip, rise and thigh together.
A repeated increment is not automatically wrong, and a different increment is not automatically correct. The intended body ranges, fit and construction determine whether the resulting shape works.
Use a point-level audit sheet
| Point or area | Evidence to record | Question it answers |
|---|---|---|
| Body chest or hip | Target, tolerance and actual value in each reviewed size | Is the sample outside the specification or is the target unsuitable? |
| Body length or rise | Adjacent-size increments and worn position | Does the garment retain the intended coverage as size changes? |
| Armhole and sleeve width | Measurements, pattern relationship and movement notes | Does extra body width arrive with enough room for the arm? |
| Shoulder and neckline | Shape, position and graded dimensions | Does the larger size stay balanced rather than simply getting wider? |
| Hood, cuff or waistband | Component dimensions and relationship to the garment | Has a connected component been left at an unsuitable size? |
| Material response | Fabric identity, stretch or recovery evidence where relevant | Is a material difference being mistaken for a grade problem? |
Keep one row per point and size in the working file. Add columns for the observed problem, proposed response, owner and retest status so a comment cannot disappear between the fit meeting and the revised sample.
Read the grade with a worked example
These dimensions are hypothetical flat garment measurements in centimeters. They demonstrate an audit, not a recommended grade or Knitwear Base specification.
| Point | M target | L target | XL target | M-to-L change | L-to-XL change |
|---|---|---|---|---|---|
| Half chest | 52 | 55 | 58 | +3 | +3 |
| Body length | 68 | 69 | 70 | +1 | +1 |
| Armhole depth | 23 | 23.5 | 24 | +0.5 | +0.5 |
Suppose the XL measures to these targets but pulls at the underarm when the wearer reaches. The table shows where to investigate; it does not prove that armhole depth should increase by a particular amount. Review sleeve width, armhole shape, shoulder position, wearer profile and fabric behavior together before specifying a correction.
Now suppose the XL half chest measures 56 rather than the 58 target. The difference is minus 2 cm at that point. Whether it is outside tolerance depends on the agreed specification, but it must be resolved before treating the worn result as evidence against the intended 58 cm pattern.
Fit the intended bodies and record the movement
Use wearers or forms appropriate to the agreed body profile. Record relevant body measurements or a controlled fit-profile reference rather than only the sample’s size label. The person available in the office may not represent the intended XL customer.
Review the base size and the sizes most likely to expose a problem, including range extremes where relevant. For a broad body range within one size, consider different positions within that range. Agree the plan with the technical team rather than assuming one fitting proves the whole range.
Record front, side and back balance, drag lines, hem position and restriction in relevant movement. Photograph the specific issue under consistent conditions. Separate a wearer’s preference for more room from failure to meet the intended fit brief.
Stretch garments need an additional relationship between relaxed garment dimensions, body measurements and fabric response. Use the compression-top sizing guide or leggings size-range and negative-ease guide for those category-specific decisions. A general grade table does not establish a compression level.
Check what washing changes
Agree the wash and dry procedure, cycle count and measurement condition, then compare the relevant sizes before and after care. Keep the fabric identity visible. A changed finish or weight can alter behavior even where the size targets are unchanged.
A hypothetical 4% length reduction removes 2.72 cm from a 68 cm garment and 2.80 cm from a 70 cm garment. The percentage is the same but the absolute loss differs. These figures illustrate the calculation only; they do not specify an acceptable limit.
Judge the washed garment against the agreed post-care requirements and fit, not only against the new-garment table. For defining the test record, use the shrinkage specification guide.
Correct the affected rule and verify its neighbors
Issue a revision that names the point, size, current target, proposed target and reason. Have the pattern team explain connected changes, then review the intermediate sizes as well as the originally failed extreme. Do not assume that adding width to XL leaves the armhole, sleeve and shoulder relationship unchanged.
Keep target changes separate from tolerance changes. Widening the tolerance to accept a poorly fitting sample does not correct the intended fit. Likewise, a sample made incorrectly should not automatically redefine the target.
Approve the revised specification and relevant size-set evidence under one version. Use the sample approval protocol to state the scope released and any outstanding checks.
After launch, review returns by size alongside sales volume and actual garment measurements. A larger count of returns in a popular size is not necessarily a worse return rate. Use the evidence to distinguish production variation, chart confusion and a repeatable grade issue.
Prepare a useful grading enquiry
Send the graded measurement table, sample measurements, material references, fitting observations and photographs through Knitwear Base’s contact page. Identify which sizes work, which fail and whether the problem occurs before or after washing. That gives the technical discussion a defined starting point instead of a request to “make XL better.”
