Divide the rectangle into 4 parts according to the picture.
Find the length between the middle of chest or back to arm holes. We first divide the middle line into 3 parts.
Next, measure 1.5 cm toward the center for the back piece, 0.7 cm for the front. The is the reference line for drawing arm hole.
The neckline and shoulder
The armhole
The neckline and shoulder of front piece
The arm hole
Finally, work on the bottom of the front.
Now, we have the bodice pattern.
I make a dress pattern to show you how to use the pattern we just make. Here is the dress.
Sorry I am not a good artist.
This a basic dress with a gathered skirt, with a bust of 60 cm and waist of 54 cm.
Let's start with the front. I want to make a snuggle fit. So, I stay pretty much close to the bodice.
In order to fit to the actual waist, I took in 2 cm on the side and made a dart of 3 cm.
Adjust the length to the back piece. You have to save this step till you finish the back piece.
Here is the finished back piece.
The sleeves, we start with drawing 2 lines to form a cross, then add the length of arm holes, front on the right, left on the left.
Mark the places that needed to used for form curves. You can use this as a bodice pattern for sleeves.
Form the curves and decide the length of the sleeves. This measurement is taken from the armpit down.
Now, we finish the sleeve pattern by taking in 2 cm on both side. You don't need to take in 2 cm if you want it looser.
As for the skirt, you can decide how wide and long you want it, then gather to fit the upper part of the dress.
That's it!
Happy Sewing!