Designing a Sweater without a Pattern

In previous posts, I have discussed how to use Elizabeth Zimmerman’s Percentage System (EPS) to design and knit a sweater and how to modify a written pattern to adjust for changes in sizing and/or gauge. Today, I will briefly describe the process of designing a sweater without a written pattern. I learned this process in depth when I first knitted a sweater using my knitting machine. Knitting garments on a knitting machine requires extensive set-up and calculations before you can even begin to knit. Regardless of whether you are hand knitting or machine knitting – the process and calculations are the same.

As in the previous design techniques, you start with a good set of body measurements and a gauge swatch to determine your stitch and row gauge. You will also need to factor in the amount of ease you wish to have in your completed sweater.

Any sweater has several basic elements: The front & back, the sleeves and the neck. Sweaters come in two basic forms – the pullover and the cardigan. If you take a minute to think through all the sweaters you have seen, you will realize that all of them are some variation of these two basic forms. So, let’s start by breaking down the elements of a basic pullover sweater.

Elements of a Pullover Sweater:

  • The Front & Back – in a very basic design, the front and the back are the same up to the point where one shapes the neckline. The Front and Back make up the tube of fabric that goes around the entire body – thus, the back consists of one-half of the total number of stitches needed for the body/chest measurement and the front has the other half. In our basic design, the back/front is essentially a rectangle – and you need to determine the width and the length from your own measurements. If you plan to knit this sweater in the round, then you will calculate the total number of stitches based upon the body/chest measurement plus ease. [(BM + Ease) X SPI]. If you plan to knit this sweater in pieces and then sew the pieces together, you will calculate the number of stitches needed for the front/back by dividing the Body/chest measurement by two and then adding in Ease and multiplying by your stitch gauge. [((BM/2) + Ease) X SPI]. For a set-in sleeve, you will also need to calculate the shaping of the armhole. When knitting in the round, at the point you begin shaping the armholes, it is best to knit flat and knit the front and back separately.
  • The Neck – the most basic neck for a pullover sweater is a round or crew neck shape. In our basic sweater design – a portion of the stitches of the center back are used for the back of the neck, while in the front there is some shaping done to make the front of the neck slightly lower than the back. The stitches not used in the neck are used for the shoulders and form the shoulder seams of the sweater. It is best to use live stitches for necklines. This allows you the needed stretch for the fabric to go over the head of the wearer. One must also keep in mind that the average woman’s head has a circumference of 22 inches. Thus, there needs to sufficient width allocated to the neck to allow the head to pass through it.Back Neck – for the basic sweater pattern, the back does not have any shaping to it. It is simply divided into three sections: Left shoulder, Neck and right shoulder. The number of stitches assigned to the back neck stitches is somewhat proportional to the chest measurement. Generally, the wider the chest, the larger the neck circumference. In this basic sweater design, there should be an equal number of stitches allocated to the shoulders, with the remaining stitches placed on hold for the neck. You determine the number of back neck stitches by multiplying your stitch gauge by the width of the back neck. You then subtract the number of back stitches from the total number of stitches for the back at the shoulders – this will give you the number of stitches for the shoulders. This number needs to be divisible by 2, so you may need to take 1 stitch from your neck stitches to even it out.

    Front Neck – the shaping for the front neck begins below the last row of the shoulder. For women, the depth of the neckline starts 2.5 to 3 inches below the shoulder, for men, the depth is 3 inches to 3.5 inches and for children the depth is 1.5 to 2.5 inches. This depth is entirely a matter of preference. The front neck is shaped as a semi-circle by gradually eliminating stitches on either side of the center front neck stitches. Thus, the center front stitches are placed on hold and then decreases are done on either side of these stitches as you knit up to the shoulders. This shaping will occur concurrently with the armhole shaping

  • The Sleeves – the most common styles of sleeve in commercial sweaters are the drop-sleeve and the set-in sleeve. For this design, I will cover the set-in sleeve. A Set-in Sleeve joins the body of the sweater at the armhole and the top of the shoulder seam. Set-in sleeves require shaping at the top of the sleeve itself as well as corresponding shaping in the front and back. The shaping is made by a series of bind-offs, increases and/or decreases. To design your sleeve you must have your sleeve length, the width of the sleeve at the armhole, the width of the sleeve at the elbow and the width of the sleeve at the wrist. You also need the depth of the armhole. There are quite a few calculations required to be able to knit a properly fitting set-in sleeve. You begin by calculating the shaping of the sleeve from the wrist to the underarm and then calculate the shaping required to form the rounded sleeve cap. Shaping is achieved by a series of increases from the wrist to the underarm, followed by bind-offs and decreases to form the sleeve cap.

Now let’s look at a basic cardigan sweater.

Cardigans are most often knitted flat – either in separate pieces or in as a one wide piece on a long circular needle. They can be knitted in the round using a steek to separate the two fronts when finishing the sweater. Shaping for armholes and neckline are mirrored for the right and left fronts. In addition, there is a knitted band of fabric that overlaps at the center front – this band can be knitted concurrently with the front using a pattern stitch or can be added to the front by picking up stitches along the center front edge after the front has been knitted.

The calculations for this sweater are essentially the same as for our basic pullover – with the exception of the front. A cardigan sweater has two front pieces that meet and overlap in the center of the garment. This means that each front piece is one-half of the front piece of a pullover sweater, plus some added width for the overlapping parts(buttonbands or borders). In our basic sweater design, you simply add the desired width of the buttonband to each front piece. For example, the front on our pullover measures 40 inches. For our cardigan, each front piece would be half of that or 20 inches and the buttonband would be 2 inches wide: 20 + 2 = 22 inches. My Excel Spreadsheet includes a section on calculating the fronts for a cardigan.

I have created an Excel Spreadsheet for all the calculations required for a basic pullover with a set-in sleeve. Click here to download the spreadsheet: Sweater Calculator.

Using this calculator and your own gauge, you now have all the calculations required to knit your pullover sweater. You can knit this sweater from the top down or from the bottom up. The shaping for a top-down sweater is done in the reverse order of a bottom-down sweater.

Terms of Use: You may electronically copy and print to hard copy portions of the spreadsheet for the sole purpose of using materials it contains for informational and non-commercial, personal use only. Any other use of this spreadsheet — including any commercial use, reproduction for purposes other than described above, modification, distribution, republication, display, or performance — without the prior written permission of Lindy’s Knits & Laces is strictly prohibited.

Today I have briefly outlined the basics of designing your own sweater using two basic sweater designs. From these two basic designs, you can create a sweater according to your own measurements out of any weight yarn. I recommend you give it a try. Listed below are some references for your further exploration – I have only scratched the surface of this topic. Happy Knitting.

If you find this post and/or my spreadsheet helpful , please leave me a comment. Thanks!

For further exploration – check out these sources:

Maggie Righetti, Sweater Design in Plain English
Leslye Solomon, The Uncomplicated Knitting Machine
Deborah Newton, Designing Knitwear.
Barbara G. Walker,Knitting from the Top Down.
Vogue Knitting

1 thought on “Designing a Sweater without a Pattern”

  1. Dear Lindy,
    I am wanting to knit myself a basic cardigan using my own measurements and without a pattern. (My last effort was far too big!) I have found your instructions so helpful. One problem is that my hip measurement is larger than my bust i.e. I am pear-shaped! I am working on your excel calculator and I think this shows that I should use the stitches calculated from my hip measurements. I am hoping for better results this time!
    Many thanks,
    Audrey

Comments are closed.

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Hats for New GrandsonHats for New Grandson

My new baby grandson has a small head. This is a family trait, as both his father and paternal grandfather have small heads and this is always an issue when they are picking out new ball caps….

So, I have been making the little guy some smaller hats. I started out by checking on what the “newborn” head measurement is — which my references state is “14 – 15 inches”. I cast on the appropriate number of stitches for the gauge of the worsted weight baby yarn I was using — three rows in and I thought: “Too Big.”

After some experimenting, I got what looked like the right circumference and knit up a beanie type hat — one inch of 2 X 2 ribbing and then straight stockinette until the hat measured 3 1/2 inches. I used the standard K2tog decreasing to form the top of the hat. I guessed correctly, because the hat fit perfectly. The circumference of this first hat was 11.5 inches.

The new parents were impressed and asked me if I could knit up a few more in different colors so that they could use them to coordinate the baby’s outfits. Now, being a new grandma, I said, “Of course!” —

So — I knit 3 more hats — each one only took about 90 minutes to knit up and I varied them a little just so I wouldn’t get too bored with them. The bright green one and the baby blue one were knit using Berat Cottontots yarn and the aqua one was knit using double-stranded Baby Ull (Dale of Norway) washable wool.

BTW — I didn’t get a picture of the first hat — also knit with Bernat Cottentots yarn — but it was baby blue with a bright green stripe.

In honor of EZ’s Brithday: Baby Surprise Jacket KALIn honor of EZ’s Brithday: Baby Surprise Jacket KAL

Elizabeth Zimmerman’s 100th birthday was August 9. One of our expert knitters in the Nebraska Knit & Crochet Guild (NKCG) started a knit-a-long (KAL) of the “Baby Surprise Jacket” in honor of EZ’s birthday. I had never done this baby sweater pattern, so I joined in the KAL.

It turned into on of those obsession driven projects. You know the ones — where you become so intrigued by how the pattern is unfolding that you simply.cannot.put.it.down. Yup, your fingers just itch to knit and your brain refuses to think about anything else — especially mundane things like laundry, cooking and other housework. That’s what this little project became.

You see, the BSJ is knit entirely of garter stitch and involves a series of increases, decreases and center double decreases to make your knitting go at right angles. It is knit in a single piece — and the fascinating thing is that it turns into a sweater without the normal sweater type shaping that you usually do. As I knit this project, I kept marveling at the ingenuity of the designer — how in the heck had she figured this out? It’s a combination of understanding geometry and the shaping required for a baby sweater — and EZ was someone who took theoretical concepts like right angles and turned them into pragmatic knitted garments. Perhaps a few pictures will help.

When you finish knitting the pattern — you end up with an oddly shaped piece of garter stitch fabric that looks like this:

Garter stitch fabric - Baby Surprise Jacket

As you can see, I knit this with two different yarns to create stripes. Now, when you fold the edges together, this striped fabric turns into this:

Baby Surprise Jacket, folded

A jacket. That’s the surprise — it actually turns into a little sweater jacket with nifty right angle striping on the front and horizontal striping on the back. And — there are only two seams to sew! Just two — the sleeves at the top. The button band is done as part of the bottom of the knitted piece, so you just add buttons and you are finished. (I’m still looking for buttons, so I don’t have a photo of the finished jacket.)

Now, the written pattern is somewhat confusing at first. There are several resources available to help sort out the sketchy instructions given in both the Knitter’s Almanac and Knitting Workshop. However, the biggest question I had was “if I knit this at a gauge of 6 stitches per inch, what size is my jacket?” EZ just tells you it will fit an infant if you knit at that gauge and if you knit it at a gauge of 5 stitches per inch, you will get a bigger jacket that will fit a larger child about 1 year old. This is this question that seems to cause knitters the most problems.

I knit this BSJ using Dale of Norway Baby Ull, which is a fingering weight wool yarn and my gauge was 6 spi. The jacket measures 15.25 inches across the chest, just at the point where the underarm is. Looking at a standard body measurements chart for baby sizes, This jacket is a 0-3 months size.

Now this sizing issue really bugged me — so I had to figure out the sizing for different gauges and correlate them to actual baby sizes. (Yes, I am a geek.) After studying the pattern, I discovered that the chest measurement is at the point in the pattern where you are knitting 90 stitches. (90 divided by 6 equals 15). So, using this point of reference, I have calculated roughly what the corresponding size will be if the BSJ is knitted at gauges of 5.5 spi, 5 spi, & 4.5 spi. I put this into a table to help others who might be bugged by this question:

Gauge Chest Measurement Size
6 spi 15-16 in. 0-3 mos
5.5 spi 16-17 in. 3-6 mos
5 spi 18 in. 12 mos.
4.5 spi 20 in 18 mos.

References:
Pattern: Ez’s instructions for the Baby Surprise Jacket can be found in Knitter’s Almanac or Knitting Workshop and/or it can be purchased from Schoolhouse Press.

Row Counter: A handy tool for keeping track while knitting the BSJ can be found here: http://www.box.net/shared/eugvsfb3lt

Video: There is a six-part video series on the BSJ, here is the link to the First Episode.

Ravelry Knitters — there is also a Rav Group for the BSJ.

Works in ProgressWorks in Progress

I have decided that I have too many projects in progress and absolutely cannot start anything else until I get at least three of them done: Not only do I have 5 knitting projects and 1 crochet project “in the works”, but have 3 more planned, plus a sewing project that must be completed in the next two weeks. I have always had the tendency to have several things going at once – but really, this is ridiculous!

Here are the knitting projects I must complete BEFORE starting anything else:

Knitted Bunny – ready for assembly.

Knitted Bunny

Knitted Bunny

Lace Scarf – this is a Christmas gift:

Lace Scarf WIP

Lace Scarf WIP

Cable Ribbon Socks – Guild Meet Up project.

Cable Rib Socks - knitting magic loop method

Cable Rib Socks - knitting magic loop method

Vintage Crochet Edging – just need to finish the write up on the pattern:

Vintage Crochet Edging -- WIP

Vintage Crochet Edging -- WIP

I plan to do the sewing project over the Labor Day Weekend and will post pictures when finished.