Best grading workflow for extended-size PDF patterns:
- Put editable size-by-size grading and a clear view of the full range at the top of your shortlist.
- CLO suits sellers who want to adjust grading values and review 2D pattern placement across sizes.
- Optitex adds documented 2D grading, size verification and 3D visualization for teams that need them.
- Choose production-focused tools when a factory’s CAD, marker or file workflow shapes your handoff.
- Treat software review as one part of fit validation, then test the sizes and fit modes your range requires.
For an independent seller preparing extended-size PDF patterns, the practical choice is software that lets you edit the grade at individual points and inspect how the pattern changes across the size range. CLO is a great choice for that workflow: its grading editor supports size-specific value edits, and CLO 2026.1 adds a single-window review of 2D pattern and graphic placement across grading sizes. Optitex suits teams that also want 2D verification and 3D visualization; Gerber AccuMark, Lectra Modaris and TUKATECH deserve closer attention when a production partner’s workflow drives the decision.
What to compare before choosing grading software
Start with the work you need to do yourself and the files you must deliver. A PDF pattern seller working alone may need a useful grading editor and fast cross-size inspection; a seller supplying a factory may also need the factory’s accepted CAD format, grading data and production files.
Comparison table Scroll to view every column ↔
| Selection criterion | What to look for | Why it matters for an extended size range |
|---|---|---|
| Per-size editing | Can you enter or adjust grade values at individual points, and see how changes apply by size? | Lets you refine a size transition or shape change instead of applying one broad rule everywhere. |
| Range review | Can you compare the base size with the full graded range, including pattern points and important lengths? | Makes it easier to spot a jump in shape or placement before publishing. |
| Measurement inputs | Can the workflow use the size chart and measurement data that define your intended customers? | The grading results need to reflect your chart, rather than an unrelated size standard. |
| Fit validation | Can you inspect the range in 2D or 3D, and can you test physical samples on representative fit models? | A screen review and a garment fitting answer different questions. |
| Handoff | Can you deliver the file types, units and documentation the next person needs? | A consumer PDF and a production CAD package are different deliverables. |
Pattern-grading research supports assessing outputs across sizes, not choosing software from a feature list alone. In one study, researchers combined three buyers’ measurement sheets, graded patterns with varying parameters and analyzed the resulting pattern measurements for accuracy, as described in the study on grading accuracy. For your own shortlist, that translates into checking the actual measurements and transitions the software produces using your size chart and grading rules.
The measurement chart and base pattern are practical inputs, too. For example, Garmenta Apparel’s pattern-grading service asks clients for a base pattern and a basic size chart that includes chest, waist and hip measurements. Its stated requirements are one provider’s process, but they are a useful reminder to have your own starting pattern and chart ready before comparing software workflows.
Handoff needs depend on the recipient. Garment Process’s delivery description says its project package includes agreed pattern files, technical notes and specifications, with physical samples when they are part of the agreed scope; it lists DXF and PLT among file formats delivered when required.
When CLO fits an independent seller’s workflow
CLO fits sellers who want direct control over grading values and a quick way to review 2D patterns across a broad range. Its grading manual describes selecting a size in the Grading tab, then clicking a pattern outline or point to enter its value in the Property Editor. The Distance setting gives each size a distance from the base-size segment or point, while the Offset setting applies spacing between sizes; changing the All value applies the offset equally to the corresponding value across sizes.
The manual also documents undocking the Grading table so you can compare size differences in a floating view.
CLO 2026.1 adds a broader review step. In its 2026.1 feature description, CLO says 2D Grading Review lets users compare and review 2D pattern and graphic placement across all grading sizes in one window. The feature supports a seller checking size-to-size placement in one view, especially when graphic location or pattern-piece shape needs attention. The claim is specific to CLO 2026.1.
CLO’s DXF import and export guide lists DXF-AAMA, DXF-ASTM and Standard DXF exports, and lets users include grading data in the DXF or export it separately as a Rule File. Each DXF file can contain one selected size group, so a handoff with several groups needs separate exports.
When Gerber AccuMark is worth comparing
Gerber AccuMark deserves attention when a seller’s work is linked to a factory pattern room, marker process or established AccuMark workflow. Gerber’s AccuMark Made-to-Measure overview describes AccuMark as pattern design, grading, marker making and production-planning software. In its AccuMark Professional Edition 12.2 notes, Gerber describes Proportional Grading with linear values or percentages, applied from a selected starting point on the pattern or from the piece center. The documentation notes that this function is common in areas such as lingerie and swimwear production.
AccuMark 12.2 lets users choose centimeters or millimeters for Standard DXF export; the file records numeric values without the selected unit, so the sender must give the recipient the unit.
Gerber’s AccuMark export guide lists ASTM DXF, AAMA DXF, Standard DXF and IGS export, with available formats depending on the data type. These format and unit controls serve manufacturing data exchange; a seller publishing consumer PDFs can focus on pattern editing and customer-ready print files.
When Optitex suits a 2D and 3D review workflow
Optitex is a closer fit when your team wants pattern grading, cross-size verification and virtual garment visualization in a connected process. On its 2D/3D CAD product page, Optitex describes turning a base or sample-size pattern into additional sizes, comparing lengths and viewing results across sizes. The page also describes combining 2D pattern design with 3D visualization. Those functions align with a seller who wants to inspect graded geometry and view the resulting garment in a digital environment.
Optitex’s O/26 release announcement says its Dynamic Measurement Chart imports Excel-based measurement data to create patterns and Optitex Pattern Design Software (PDS) files automatically. The announcement also describes synchronizing measurement selections with grading tables and generating all measures in one action. This is relevant when measurement data already live in spreadsheets and feed into repeated pattern development.
Optitex’s product materials describe an apparel and manufacturing workflow, including tools for 2D patterns and virtual samples. A digital-download seller can still use the grading and review functions, but should weigh whether 3D garment visualization or automated measurement input addresses a real part of their work. The feature fit is strongest when the pattern range is managed alongside virtual samples or a broader development process.
When Lectra Modaris makes sense
Lectra Modaris makes most sense when a seller’s production partner or team already develops apparel products through a Lectra workflow. The Modaris V6R1 announcement, published in March 2009, describes pattern creation and finalization, industrialization, grading, verification and pre-production. The V6R1 announcement separately describes all-size grading; its Modaris ExpertPro section describes links between garment elements to speed model construction and finalization and reduce repeated verification.
That makes the documented strength here broader model development, with grading integrated into a fashion product-development cycle. For a solo PDF seller, CLO’s documented per-size grading edits and CLO 2026.1 cross-size review are a closer match; Modaris fits better when grading sits within a broader model-development and verification cycle.
When to evaluate TUKATECH
Evaluate TUKATECH when your pattern workflow is moving toward automated development, virtual sampling or factory operations. The company describes TUKA APM as a pattern-making and grading module within TUKAcad. Its stated workflow starts from measurement values, produces a 2D pattern with grade rules and can connect to TUKA3D to generate 3D samples. The company also describes the software as a cloud-based subscription add-on to TUKAcad.
The production context appears in a TUKATECH customer example: Adrianna Papell’s New York and China offices use TUKAcad for pattern making and grading, SMARTmark for marker making and fabric planning, and TUKA3D for virtual samples. If you sell PDF patterns directly, evaluate TUKA APM when measurement-led automation or connected 3D samples address a recurring need; its relevance increases when a production partner already uses TUKAcad and TUKA3D.
How to evaluate the range before publishing
A sensible release check combines pattern data, a full-range screen review and fit testing. Use software to inspect changes; use actual measurements and garment fittings to test how the finished sizes work.
- Set the size chart and base pattern. Define the measurement chart your pattern promises to serve, along with the base size from which grading begins. Keep the chart and pattern version together so later edits can be tied to the right inputs.
- Review grade changes at important points. Inspect the dimensions and transitions your design depends on, such as chest, waist, hip, shoulder and armhole. In CLO, select the size to edit, choose a pattern point and enter the grading value; its 2026.1 review can then show pattern and graphic placement across grading sizes.
- Compare the full size range, not just adjacent entries. Look at the base size, each size step and the endpoints. This helps reveal an abrupt change or a shape shift that may be hard to notice when inspecting one pattern piece at a time.
- Fit representative sizes on bodies. A University of Minnesota research record for “Optimized pattern grading” describes a study of a sheath dress in Misses sizes 6–20, comparing traditionally graded garments with fit-to-shape versions using measurements and visual analysis. The authors recommend multiple fit modes for ranges of more than five sizes, with a fit model near the middle of a group spanning no more than two sizes up or down.
- Prepare the customer and production files separately. A consumer PDF pattern needs clear print and assembly instructions; a factory handoff may need CAD files, rule data, units and technical notes. If you create both, verify each output against its own recipient’s requirements.
Include the size transitions that matter to your customers in each review.
Which of the five tools fits your pattern business?
Comparison table Scroll to view every column ↔
| Your current workflow | Best fit to investigate | Why |
|---|---|---|
| You publish PDF patterns independently and want to edit size-specific grading values and review the range in 2D. | CLO | The grading manual documents selected-size edits; CLO 2026.1 documents cross-size 2D Grading Review. |
| Your team wants to compare lengths and sizes, then inspect a 3D garment. | Optitex | Its product materials describe 2D grading, size verification and 3D visualization; O/26 documents spreadsheet-based measurement input. |
| Your production partner needs AccuMark-oriented grading, markers or manufacturing handoff. | Gerber AccuMark | The documented workflow extends from grading into marker making and production planning, with defined DXF and package options. |
| Your work fits a broader fashion product-development cycle. | Lectra Modaris | The 2009 Modaris V6R1 description covers pattern development, grading, verification and pre-production; a separate ExpertPro section describes links between garment elements. |
| You need measurement-led pattern automation or an established TUKATECH virtual-sampling workflow. | TUKATECH | TUKA APM is documented as a TUKAcad pattern-and-grading module, with a TUKA3D sample workflow. |
For most independent PDF sellers who need direct grading edits and an efficient size review, start by evaluating CLO. Move to a production-centered option when factory workflow, measurement automation, 3D virtual samples or format-specific handoff is an actual requirement rather than a possible future use.
FAQ
Does a 2D grading review prove that every size will fit?
No. A 2D view helps you inspect pattern changes and placement, while measurements and garment fittings test fit on bodies. Use both for an extended-size range.
Does a seller publishing PDF patterns need factory CAD software?
Factory CAD features matter when a production partner requires compatible pattern files, grade data, units or manufacturing details.
Can CLO export every grading size in one DXF file?
No. CLO’s DXF export guide says only one grading size group can be selected per file. The export can include grading information in the DXF or provide it separately as a Rule File.
What makes Optitex a useful comparison with CLO?
Optitex documents 2D grading, size verification and 3D visualization, while CLO documents editable grading values and, in version 2026.1, cross-size 2D review. Choose between them based on whether 3D virtual samples and measurement-chart automation belong in your workflow.
When should an independent seller consider TUKA APM?
Consider it when measurement-led automated pattern making, grading and a connected TUKA3D sample workflow meet a concrete business need.