Once you have your pattern and your fabric, you have to prepare them both for sewing.
Unless you are using a stretch fabric that could be prone to running, I sincerely suggest washing it first. Use cold water, just a little detergent, and a gentle cycle. Dry it on medium or low without dryer sheets or fabric softener. Washing the fabric helps it to all shrink evenly if it was stretched out in shipping, gets off any surface dirt picked up during manufacturing and shipping, and handles any color displacement that might occur.
You can wash the chiffon or georgette if you want, but I rarely bother to because the cut ends will ravel.
To prepare the pattern, start by taking out the instruction sheets. On the first page you'll see a list of pattern pieces with the "view" they correspond to. We are making view
B. Carefully unfold the pattern tissue sheets and cut apart (but don't cut on the actual pattern lines) all the pieces you will be using. Notice that in one corner of one of the sheets there is size/measurement information, and also cutting layouts. Put these with your instruction sheets. Put anything you aren't using back in the envelope.
Set your iron on low, and gently iron all the pattern pieces you will be using. For accuracy's sake, you want the pattern pieces to lay flat when you are cutting out the fabric. Notice that pattern pieces 7 and 8 in the skirt have to be attached to each other. Attach them as directed, using tape or glue stick or whatever. Just do it neatly so everything lines up and doesn't ripple or wrinkle. Now put all the pattern pieces aside where your cats won't get them. One of mine delights in shredding pattern tissue.
Now comes the difficult part: taking your measurements. Start by putting on whatever undergarments you intend to wear under the dress. This pattern covers a regular bra, and as such does not include instructions on how to deal with bra cups (this is partly why this is a good starting garment for beginners, and is also BYU-friendly).
Using a tape measure, take the 11 measurements listed on the sheet. It's best to measure three times, and then average the results. It's even better to have a friend do this rather than trying to measure yourself, but I measure myself all the time and have never had a real problem with it.
By the way, this dress is designed for someone who is 5' 6" tall. I will discuss making adjustments as we go.
Once you've taken all your measurements, circle the place on lines 2, 3, and 4 that match your measurements. If you are between sizes, select the smaller size. Hopefully you will find that all three of these are in the same size column. If not, don't worry, we can make adjustments. We're just trying to determine your "base" size for the purpose of this pattern.
Now this is where it gets a little weird. We ballroom dancers like our dresses to fit snugly. So, whatever your base size is according to the charts, you should cut the dress one size smaller. So, if it comes out that you are an 8 in the pattern size (that's about a 31 1/2" bust, a 24 1/2" waist, and 34" hips) then you will cut a 6. I base this on experiment I did with the pattern a couple of weeks ago -- I think the pattern as designed is more roomy than we like.
Do not fret about the numbers. Ready-to-wear clothes sizes have lost all relationship they ever had to pattern sizes. It's just a number. Pretend it's a letter or a mysterious Prince-like symbol if that helps. My ready-to-wear size is about three sizes smaller than my pattern size! That said, if you are already small (smaller than 31 1/2" bust, 24 1/2" waist, and 34" inch hips) it might be tricky downsizing this pattern enough for you to use.
Take a look at the pattern pieces. You will see that all the sizes are drawn on the same sheet. If you are one base size, then use a highlighter to mark the pattern in a few places to remind you where you're supposed to be cutting. But don't cut out yet :)
If you are not one size (say your hips are a size or two bigger), then we have some adjusting to do. We also might have some adjusting to do based on your measurements on on lines 5, 8, and 9. Making these kinds of pattern adjustments, plus adjustments to the neckline, back, and armholes, will be the topic of my next post.