I am making significant progress on my Color Block Vest. In fact, I am nearly done! So Saturday, I realized that I really needed to go buy buttons for this vest. And off I went.
Now, I must admit that it has been some time since I ventured into a fabric store to buy buttons. And usually when I am buying buttons, I am also buying thread and fabric to match. What I discovered is that in the time that I have been absent from the fabric store scene that things have really changed. Changed in a good way, actually. Oh my! the selection was enormous! And really wonderful. In addition to the standard buttons in rather standard colors that come in sets of four or five — there are all these unique and stylish buttons available. Who knew? Obviously, not someone like me who hasn’t ventured into the button section of the fabric store in a good long while.
I was enormously challenged — I had so many choices! Wonderful choices! And then…I found them! The perfect buttons for my vest!
Aren’t these just wonderful? They have a lovely brown background with swirls of pink, green and darker reddish brown. They match the three colors where they will be placed nicely.
As wonderfully matched as these buttons are — I must also admit to sticker shock when I went to check out. They were on sale, fortunately, but even at that they were expensive. I paid $7.00 apiece for them. (ON SALE!) Who knew buttons could cost so much? Now, I was willing to spend the money to get these perfect buttons — especially since I have invested money in a high quality yarn for this project. Still I think that buttons should not be so expensive. Even if they are perfect…
The Long-Tail Cast On is one of the most common and popular cast ons. It is an all purpose cast on that gives an attractive and elastic edge and works in almost every type of project. Because of its structure, this cast on creates the first row of your knitting – which is usually considered the wrong side of the work for stockinette stitch.
As the name implies it starts with a long tail – which can be a challenge for a knitter to figure out how long to make the tail before you start making stitches on your needle. A general rule of thumb for this length is 3 times the length you need to form the number of stitches to cast on. Some knitters wrap the yarn around the needle the number of times that equals the number of stitches. I’ve used both methods and both work fairly well.
The cast on starts with a slip stitch (some knitters omit this step). You then form a “slingshot” by holding the needle in your right hand and using the thumb and forefinger of your left hand so that one of the two strands wraps around the thumb and the other wraps around the forefinger, forming a “Y”. The tail strand should go over the thumb and the working yarn should go over the forefinger.
To form a new stitch, put the needle under and into the loop on the thumb, then go over the yarn on the forefinger and bring the strand through the thumb loop. Drop the yarn off the thumb and gently tighten the loop on the needle. Repeat until you have the desired number of stitches.
There are several variations of this cast on. I have included a link for the Alternating Long Tail Cast on, which provides a way to alternate knit and purl stitches for a ribbing and gives a moderately elastic edge.
I have covered the basics of how to make a Gauge Swatch and calculate your stitch and row gauge in my previous three posts. Today’s topic will cover some basic math to help you estimate the yardage that you need using your yarn, your needles, and your gauge to make a sweater.
Let’s say you want to make a sweater using yarn from your stash and you need to know if you have enough to make it. To make this estimate, you need the measurements for the sweater you want to make. If you are using a pattern, the finished measurements should be stated within the pattern – ideally on a schematic. Some patterns may only state the desired measurements within the text of the pattern and you may have to read through to find them. If you are making the sweater without using a pattern – you would use the measurements of the individual who will be wearing the sweater.
The image below shows a schematic for the back of a sweater of a drop sleeve sweater. The back is 28 inches long from the hem to the neck and it is 20 inches wide. Both the front and the back of this type of sweater are essentially rectangles.
Schematic of Back/Front of Sweater
The schematic for the sleeves of this sweater are shown below.
Schematic of Sleeve
At this point, you have the numbers you need to calculate the number of square inches of fabric that you need to make for this sweater. For the front and back, multiply the length by the width on the schematic and then multiply that number by 2. Using the numbers from my example above:
20 * 28 = 560 560*2 = 1120 square inches for front and back.
The sleeve is a trapezoid shape. The formula for the area of a trapezoid is:
[(b1+b2) * h] / 2
Where b1 is the width at the bottom of the sleeve(8”) and b2 is the width at the top of the sleeve(15”) and h is the length of the sleeve(18”). Using the numbers from the sleeve schematic, the area for one sleeve is 207 square inches. Since you need two sleeves, you then need to multiply the area of the sleeve by two. (414 square inches)
Now, here’s a short cut – if you place your sleeves next to each other so that the tops of the sleeves are parallel – you have a parallelogram. To get the area of this parallelogram you simply multiple the width(15”+ 8” = 23”) by the length(18”). Try it – you’ll get the same number as above.
Add the square inches for the front and back to the square inches for the sleeves and you have the total number of square inches of fabric in the sweater. Now that you know the total number of square inches of fabric you need, you will need to use the yardage and weight information of the yarn you want to use to estimate how many skeins or balls of yarn your sweater requires. The yardage per weight of the yarn will be found on the yarn label – see image below:
You will use the yards per gram value in the estimate for total yardage. Now you need to knit a swatch. The swatch should be in the same stitch pattern that you plan to use for the body of your sweater. This swatch does not need to be the same size as your gauge swatch, but it should be wide enough and long enough to get an accurate weight, length and width measurement. After you knit this swatch, you will measure its weight using a scale that measures to the nearest tenth (0.1) of a gram. Next measure the length and width of the swatch and multiply these values together. This gives you the number of square inches in your swatch. Now divide the number of grams by the number of square inches.(Do not round). You now know what 1 square inch of your yarn weighs. This is the number you need to calculate how much yardage you need for your sweater.
Example: My swatch measures 3.5 inches by 4.5 inches, which gives me 15.75 square inches. The swatch weighs 9.6 g. Dividing 9.6 by 15.76 gives me 0.622 g/square inch.
Here’s the final set of calculations:
Take the total number of square inches of fabric and multiply it by the number of grams per square inch. This gives you the total weight in grams for your sweater.
Total Number of Square Inches * grams/inch2 = Total grams of fabric
Total Grams/Square Inches = (1120 + 414) * 0.622 = 954.148 g
Now take the yards per gram value from the yarn label. (For example 218 yds/100grams). Divide the yds by the grams to get the number of yards in 1 gram of yarn. (For example: 218yards/100grams = 2.18 yards per gram.) Multiply the total number of grams of fabric by the number of yards per gram to get the total yardage for the sweater. Using the numbers from the examples above:
Yards per gram = 2.18 yds/g
Total Yards of Yarn = 954.148 * 2.18 = 2080 yds
To determine the number of skeins, balls or hanks of yarn you need: Divide the number of yards by the number of yards in the skein. Or divide the total number of grams by the number of grams of the skein. Remember that you will want one extra skein for swatching. (In my example, I would need 9.5 skeins, so I would want 11 skeins with one extra for swatching)
What to do if you don’t have the yarn label
To determine how many yards of yarn you have when you do not have the yarn label or any information, simply measure out 10 yards of your yarn and weigh it. Divide the weight by 10 and you have the weight for 1 yard of yarn. Now weigh the skeins/hanks of yarn and multiply by the weight of 1 yard. This will give you the number of yards for each skein/hank.
I am making progress on my first pair of “regulation socks” for Socks for Soldiers. It has been slow going. I had knitted about four inches in 2 x 2 ribbing when I decided that I had an issue with laddering. Usually when you knit on two circulars, you don’t have a problem with ladders developing between the needles – but there they were… I figured out that I was causing the problem by tugging too hard on the yarn when I knit the first two stitches on each needle. The Regia Stretch yarn is really stretchy and because I was pulling the yarn too tightly I had ladders. So, I made a trip to the frog pond and frogged the socks all the way back to the beginning. (Sigh…)
9 inches of sock leg.
Well, I now have 9+ inches of leg done on both socks. The first 8 inches were knit on size US 2 (3.00 mm) circulars, with a stitch gauge of 8 spi. Following the directions of the official pattern, I switched to Size US 1 (2.25 mm) circulars, which have a gauge of 9 spi. The leg continues in ribbing until it measures 12 inches and then you begin the heel. I’ll post an update when I get to the heel.
