However as long as you keep one simple principle in mind, you can draft sleeves that fit easily. Marion McNealy shares with us her secrets of drafting stress free fitted sleeves that set into the armscye easily every time.
A key principle in sewing that you already know is that if two pieces of fabric are the same length, they will fit together smoothly. What you may not realize is that this applies to curves as well!
I'm going to teach you to draft a basic fitted sleeve that has the seam going up the back of the arm, not under the arm as most modern commercial patterns. It also has NO sleeve cap ease, so it will fit smoothly into the armscye without gathers or fuss. This sleeve is not designed with a button cuff, just a straight fitted sleeve that you can fit your hand through easily without buttons at the wrist.
If you want a tighter sleeve, you can decrease the ease added. The amount of ease for a tighter sleeve will vary depending on the material you make your sleeve out of and what you wear under it. A stretchy wool can be made with less ease than a tightly woven silk taffeta.
I recommend 3 in.(7.5 cm) as the ease around the Biceps and Elbow, and 2 in.(5 cm) around the hand for your first draft. As always when trying a new pattern, make a mockup before cutting into the good fabric!
To draft a sleeve using this method you'll need several measurements:
In order to create a smoothly fitting sleeve, we'll also need to measure the length of the armscye that the sleeve fitting into. You'll need your pattern pieces, string and some canned goods or pattern weights to hold the ends down.
Take a large sheet of paper, it should be about 8 inches longer than the Arm length and 8 inches wider than the Bicep measurement. Don't skimp on paper, sleeves take up a lot of room.
Measure and find the middle of the paper, and draw a vertical line. This will be the center of your sleeve.
|Measure 3 inches from the bottom and mark a line. This will be the cuff edge of your sleeve.|
|From the bottom line, measure up the center line the length of straight arm length measurement, draw a horizontal line.|
Then measure from the bottom line the bent arm length measurement, draw a horizontal line.
From the top line, measure down and mark measurement B, the length from Shoulder to Elbow. Draw a horizontal line
Here are all the lines we have so far
Now we add in the sleeve width measurements:
Top line, Biceps measurement + ease
Mid line, Elbow measurement + ease
Bottom line, Hand around the knuckles + ease.
|Now connect the dots with a straight line|
Now take your piece of string that you used to measure the armscye length. Lay it on the paper and arrange the string in a wavy line, like this.
It will take some fiddling with it, you want the dip to be no more than 2 inches below the top line, and the top curve to be no more than 3 inches above the top line.
Sometimes the string doesn't fit with such a flat curve, so its OK to make it fit within the parameters and increase the sleeve width.
But you can't shorten the string, otherwise the sleeve won't fit in the armscye!
When the string is adjusted properly, carefully draw right next to it with a pencil.
Here I've demonstrated a sleeve where the string didn't fit the width of the sleeve, so the width had to be increased.
The red is the new line, the brown the old.
The sleeve is now ready for seam allowances. Add them on ALL sides.
When you cut and sew the sleeve you will have a left sleeve and a right sleeve. Just remember that the seam goes up the back when you pin it to the armhole. I like to pin it in and then double check before sewing it. This saves having to rip it out when you make a mistake.
Here are pictures of a finished sleeve set into the armhole.