While FBAs are everywhere, there not many online tutorials to make SBAs (small bust adjustment). I’ve followed
Trena’s, they’re very clear, and this one from
Sew L.A.. It’s not that they haven’t worked, it’s just that I forget to do it and realize it when the fabric is already cut and probably sewn *sigh*.
With the first Jasmine (noir), I was in a rush and I completely forgot to adjust it, so now I swim in it. Nobody notices, thanks to the busy print of the fabric, but I do - never again!
So when I started the second version, I tried the SBA from Colette’s book. So here it is, step by step, how to modify this pattern to fit a B cup*. You can check all the photo’s, enlarged, in
Flickr.
1.Trace the pattern and draw the seam allowances (1.5 cm).
2.Identify the apex of the bust (that’s the nipple, people) in the pattern. It should be about 2 cm to the right of the side dart.
3.Measure the armscye seam (minus seam allowance) and mark it approx. halfway (in my case, 11.5 cm). Draw a line from this mark to the apex.
4.With a pattern rule or 90º set square, draw a line from the apex to the waist. If the pattern had a waist dart, the line would go through it.
5.Draw a line from the apex to the side seam, through the side dart. Make a mark just before the apex.
6.Mark the new bust apex, according to your body measurements**. In my case it’s 9 cm instead of 10.5 cm, from the central seam. Not counting the seam allowance, obviously.
7.Slash the 3 lines: the first to the armscye not all the way, only up to the seam allowance (it’s a pivot point, not a proper slash). The side line is cut up to the mark just before the apex.
8.Move the left side, overlapping to the right (about 1.5 cm in my case). The side dart becomes narrower. Move also the right side, to keep up with the proportions of the waistline. Tape everything to keep it in place.
9.This step is not part of the SBA, but I often have gaping neckline problems. I don’t know if it has anything to do with a small bust or just a narrow torso problem. In any case, a tiny dart in the neck usually solves my gaping problem.
10.So now the apex is about 9 cms. from the central seam. Redraw the dart, about 2 cm to the left of the apex.
11.The pattern is now finished! I like to retrace it again, to have a clean pattern and avoid messiness when cutting the fabric. Repeat the whole process if necessary.
12.If the adjustment affects other pattern pieces -in this case the neck dart would affect the facings- modify accordingly.
*Note 1: I haven’t, obviously, followed any pattern drafting courses. What you’re reading here are the results of my own experiments. I don’t pretend to be an authority in drafting, I'm just trying to help adjusting a pattern. Since every body is different, what works for me may not work for you. So take out your rules, adapt it to your measures, sew a muslin, and modify it again till you’re happy with the results. It takes time, sure, but it’s totally worth it.
**Note 2: in the book, the second step asks you to identify the bust apex
of your own body not the pattern’s. I didn’t notice till I had made all the modifications, absent minded that I am. No worries, it means that you have to move the pattern from right to left, instead of left to right like I did. The result should be the same, if not, please let me know!