Sewing Tips

Why are Indie Patterns Tested in Every Size?

Anyone who reads this column regularly knows that my pet peeve is inconsistent pattern grading. I’m annoyed by it, confused by it, and continue to ask “HOW does that happen? It’s not even possible to have inconsistent shapes and angles if using an automated grading program, or if manually grading by shifting on an x/Y axis.”


Inconsistent grading seems to be a problem  when “computer grading” is done in a general-purpose vector program. But I’m still learning WHY it happens. This week in a Facebook group I saw this screen shot of a leggings pattern by an indie designer; please note the wildly inconsistent grading along the size range:


One of the Facebook group comments was “I recall someone saying that this designer drafts her patterns to each individual tester”.

So my question is “Why would you do that? Why do indie pattern companies FIT test in multiple sizes?”

(Postscript: My thanks to reader Debbie Cook for this clarification point: I’m referring here to Alpha-testing, not Beta-testing. Beta testing (checking to make sure the average consumer can easily download the pdf file, and follow the cutting the sewing instructions) should be done by a variety of sewists at every skill and experience level.  Alpha-testing (checking the pattern for accuracy in fit/measurements/ease, walking the seams, seeing if the corners are trued) should ideally be done in-house by professionals. Of course this is expensive, and so it makes sense that indie designers would take advantage of the skills of volunteer sewists….however sometimes “too many cooks spoil the broth”: if the designer listens to fitting feedback from a variety of testers having different proportions AND THEN GRADES TO THEM, the resulting pattern can be a mish-mosh. More on Alpha and Beta testing here: )

This may be surprising to the many sewists who volunteer for indie pattern testing, but here goes: Apparel manufacturers do not fit-test in every size.  They fit-test in the central size, and then accurately grade the pattern up and down the size range scale, using grade rules. (Of course if the design is being expanded into a different size range  (Infants, Toddlers, Kids 2-6x, Kids 7-14, Juniors, Women’s Plus, Maternity, etc) , a new block is used for that range and the central size for that range is fit-tested.)

In apparel manufacturing, samples are fit-approved on a fit-model , generally a size 8 in womens-wear and a size Medium in mens-wear. “Clothing companies tend to make clothes starting from the middle size (about an 8) and then scale up and down for sizing. “  Same story for commercial pattern manufacturing (paper sewing patterns for the home-sewing market): the fit is tested in fit-model size only, on a professional fit-model whose body works well with that manufacturer’s fit block.

(Fun fact: some manufacturers have special dressforms made, exactly following the figure of their fit model, and name the dressform with the fit model’s name.)

Why isn’t every size tested?

  1. Professional fit models are not available in every size (modelling agencies only hire fit models in “fit model size”
  2. Even if they were, fit-models cost about  $150 to $250/hr, so testing multiple sizes would be cost-prohibitive
  3. Sewing up every size in samples would be cost-prohibitive and time-consuming


So why would an indie patternmaker fit-test in multiple sizes? Possibly because each one of the above objections does not apply:

  1. Amateur fit models (home sewists) are plentiful in every size
  2. You can get testing done in exchange for a pattern file
  3. Indie pattern testers provide their own sample-making using their own fabric and time


If indie patternmakers CAN fit-test in multiple sizes, the question becomes, SHOULD they? In every endeavor there are benefits and drawbacks.

Benefits of fit-testing in multiple sizes:

  • More feedback
  • More photos (as Delphine of Just Patterns commented “seeing the pattern sewn in many sizes is what triggers sales”)

Drawbacks of fit-testing in multiple sizes:

  • Conflicting feedback: since testers do not all have  fit-model proportions, each tester will have different fit issues.  Professional fit models not only have to meet the standard chest/waist/hip WIDTH measurements, they also get measured for LENGTHS (shoulder to bust high-point, shoulder to waist, waist-to-knee, etc).  Amateur models may have all different length measurements (ie; different proportions), causing each garment to fit differently.  If you try to fit-approve everybody, you end up fitting nobody. And if you use each separate size for fit-approval, and grade your pattern that way, the result is a jumble of inconsistency.


The most important reason that professionals do not fit-test in every size is this: it’s not necessary. If you use a good grading service, with consistent grade rules throughout the size range, all of the sizes will fit well. They won’t fit everybody perfectly (this is not made-to-measure or couture we’re talking about) but they will fit the greatest number of people adequately.  As a consumer (of patterns or of ready-to-wear) , once we’ve found the designer whose blocks work best with our own bodies, we can count on a fairly consistent fit regarding shape and proportion, even if we go up or down a size.



And then this happened: The designer for Lil Luxe patterns sent out an announcement  this week regarding some changes in her business, and I noted this statement with particular interest: “After trying to expand up to size 12, with little luck of testers available, we decided to work with a standard size chart for sizes 18m – 10 yrs.”

I haven’t tried her patterns yet, but I do have the City Girl Romper, and look how  beautifully consistent this grading is!  She could easily add size 12 without needing to test on a fit-model (as long as it is for a not-yet-developing figure; going into a tween size range does require new fit-testing for that proportional shape):




So my question remains: “Why are indie patterns tested in all sizes?

  • Do indie designers think it is necessary for some reason?
  • Is it for the photos?
  • For media exposure on FB, in blogs, on Instagram, etc?
  • Is the patternmaker not confident in their grader’s abilities?

Here’s what I do know:  for the purpose of fit-approval, testing in the full size range can backfire if a variety of different-proportions test results are all used simultaneously instead of grading from a central size.

Happy Sewing!

Best, Janet


  • Debbie Cook

    I don’t think indie patterns are necessarily tested for *fit* in all sizes (which is actually pretty easy to believe! hah!). They call for testers who then test downloading and assembling PDF patterns and going through the instructions with an actual sample to test those processes. The “designer” then end up with a whole slew of different sized testers’ photos of their finished projects which they use as “advertising” on blogs, etc.

    Also wanted to say that I enjoy your blog very much.

  • SewingTidbits

    I have only a limited experience of selling digital sewing patterns (we started in February this year) but from what I see so far seeing the pattern sewn in many sizes is what triggers sales. So I would say it’s mainly for marketing reasons…
    We developed, tested and graded (with a specialized CAD software) the patterns in house and put the patterns for sale. But we ended up setting up a facebook “development” group to have feedback on different aspects, understand users of our patterns better and have pictures on various body types. I think the latter gave a significant boost to the sales. A few weeks after us I saw that Jennifer Lauren launched something similar so I’m guessing this is really what it’s about!

    I only found your blog recently because I don’t really look at the children pattern offering, but I love your discussion posts (and had no idea people were not doing “regular grading), they are 100% applicable to adult patterns too!q

  • [email protected]

    Hi Debbie, Well there’s Alpha-testing and there’s Beta-testing…..testing for downloading and assembling is Beta-testing, and for that purpose, the more the merrier. Having a pattern Beta-tested by sewists at all levels of ability is hugely helpful for finding errors and typos, determining which procedure steps are confusing, etc. What I’m confused by is the Alpha-testing for fit: in industry this is done in-house by professionals…it seems that when this is outsourced to customers that fit-confusion can be the result.

    Thanks for your comment and I’m going to update the post ! Best, Janet

  • [email protected]

    Good point, Delphine, about seeing many sizes in photos….I’m updating the blog post about that (thank you!). The process that you are using for Just Patterns (developing, testing, grading in-house) is ideal. However. many indie businesses outsource much of the testing, including fit-testing, to customers in exchange for the pattern. The result can be a final pattern file with multiple shapes and proportions….many sewists have no problem with this, but I find it so confusing to work with! Thanks for your comments…I;m wishing you much success with your business! Best regards, Janet

  • Jen

    I am probably going to be run out of town for saying this…BUT I think it *might* have to do with lack of experience. Lack of working in the industry and with pattern making in general. It seems everyone wants to be a fashion designer but really understanding the engineering behind pattern making and the correlation to fit is a lot different than sketching up some pictures and hoping for the best! They have the perfect market too – new sewers who don’t know any better and fall in love with the look. It really does a disservice to them because they don’t learn the proper techniques and accept ill fitting clothing as a norm.

  • Bernadette Reinecke

    I like to have testers cover all the size ranges because I do all the work myself – drafting, sewing, writing, editing, digitizing… It’s nice to have someone else check each size for layering problems, line weight, notches, etc(not that I don’t also check but an extra set of eyes never hurts).

    I know that I can gauge size interest based on tester interest. If I have a difficult time finding testers in size 12, I’ll probably also have a difficult time finding buyers. There is a lot of work that goes into expanding sizes and if you don’t think there are enough buyers out there, then I can see deciding against it. Diminishing returns and all that.

  • [email protected]

    Oh I totally get it, having Beta testers in all sizes and of all abilities is great and makes total sense. But your patterns have already been Alpha tested in house. The problem I see is when designers have volunteers doing the Alpha testing, especially when they give differing feedback regarding fit…and then the patternmaker tries to create the final pattern with each size fitting each tester. I have so many patterns that are a jumbled mess of shapes and proportions.

    I’ve often wondered about extended sizes in the girls’ range….I hear people say they want larger sizes, but I don’t know if that’s for older girls, or for young girls who wear bigger sizes. When I was a kid the department stores had “Husky” departments for larger-sized boys, and something for girls but now I forget what they called it. Funny that I don’t see that anymore at retail, yet there are plenty of bigger kids around….

  • [email protected]

    Hi Jen, no worries, no judgments! The fact is that desktop-publishing has a low “barrier to entry”: in America 80% of the population has a home computer and 70% have broadband access. There is no license required, no degree necessary to design and sell patterns (there are safety regulations for selling apparel but not for patterns).It is 100% “buyer beware” when it comes to product quality. Some designers are highly skilled in attracting customers…it seems imbalanced at times, how much effort is put into merchandising, marketing, photography, social media, but not into technical product quality. And how would anyone new to sewing know if the instructions and drafting and grading are good or not? It’s kind of like trying new recipes, if you are an amateur cook, you “can’t know what you don’t know”.

  • Melissa Prendergast

    Indie designer chiming in here! While our alpha testing is only done with one or two per size range (ie. 12m-2t, 3t-6, 7-12, ect.), for our beta testing, we try our best to get a tester for every single size. Here’s why… customers have no idea how grading works. So when I have a customer tell me they want to know how a garment would look on their size 12 daughter, when I tell them that specific size wasn’t tested, they often freak out. They are instantly worried that the size 12 garment won’t fit properly (and let’s face it, if they are new to me and not sure of the quality of my patterns, I can see why they might have that concern. Not all indies are created equal). Now, I can, and often do, tell them that while we didn’t have a size 12 tester, here’s a size 10, that doesn’t always satisfy them. I have seen designers vilified for not testing one specific size in a size range before. Truth is, it isn’t always easy to get testers for certain sizes. So while as a designer, I totally agree that if your grading is correct, you don’t need to worry about testing every size, this is one reason why I personally do it. Some of the above-mentioned things are other reasons as well. Just wanted to give a different perspective.

  • Esther

    I am an amateur sewist, have been sewing for 5 years, never used Indie patterns. I would never be a tester for an Indie company, as I value my time very much, I wouldn’t do all the job of beta-testing the pattern just for the price of a pdf pattern and I would not definitely advertise for free on my blog…
    By the way, I love your blog and I find it very interesting, regarding garment sewing in a technical way. I am an architect btw.

  • Denell

    i’ve been considering the result of indie pattern testing for fit on every size and came to a similar conclusion that you end up with patterns fit to the testing sample, which may not truly fit the size they are testing.. I have noticed that the ability to print only one size via the layers option (which may be happening during teating) makes it difficult to evaluate drafting and consistency of grading. I just tossed a pattern I actually tested for because when I looked at all the sizes together, the grading/drafting was a mess. I feel bad now about not being better at recognizing it, but I was pretty inexperienced at that point and may not have caught it since I printed only my size.

  • [email protected]

    I think this happens quite often: each size is tweaked to fit that particular model/size….but since it’s doubtful that all of the testers are “fit model” proportions, it doesn’t make for a cohesive size range. Please don’t feel badly about not recognizing issues in drafting or grading, that’s not your job as a tester…that is alpha-testing and should be done well before beta testing begins. Customer testing (beta testing) is really about your experience, as a consumer not a designer, in using the pattern successfully. As long as you report back your honest experience, you’ve done your job well!

  • [email protected]

    Hi Esther! From what I hear, beta-testers do it for the sense of community, for the thrill of being an insider on a new style, for the learning experience, as a means to ensure they will finish a sewing project…lots of intangible reasons. But I know what you’re saying, for the amount of time involved, plus the expense of fabric, and then the effort made to have the finished garments modeled and photographed….all for a free pattern? PS: my grandfather was an architect!

  • [email protected]

    Hi Melissa! Sincere apologies for the late reply (I am living in the world of domestic dysfunction with a new puppy and have been away from social media). Also many thanks for your professional input. Wow, you are certainly put in a difficult situation if every customer expects you to fit-approve every size. You’re right that the average person has no clue how grading works, and how would they? I wonder if they think that every size is fit-tested in the mass-production apparel industry. Maybe if people knew that garments are only fit-approved in the central size in the garment industry, they wouldn’t have such expectations (of fitting the entire range) in patterns…..

Leave a Reply

Your email address will not be published. Required fields are marked *