This is the pattern for the dress i posted a few days ago.
if the instructions on the left are a bit confusing, here they are typed out.
So where there is lines on the figure, that is the place to measure all around.
A = M2x2 (so on the little figure, the line that says M2 is, measured out in cloth x2)
B&C = M2-M3 (or however long you want the dress to be from the height of M2)
E = M1+ 2 In on either side for buttons.
H = however wide you want the front to be.
I = M2- about 2 inches.
Measure out all the pieces of cloth and cut them to size, with about an inch extra for seams and mistakes.
Pin either end of the elastic to side A of the big rectangle of cloth. if you stretch the cloth with the elastic and it doesn’t fit, just cut the cloth to as far as the elastic stretches.
While stretching the cloth with the elastic, sew along the cloth with the elastic still stretching.
When you release the elastic after sewing, the cloth should bunch up to create a skirtish sort of thing.
Sew side A of the big piece to side E of the little piece, not stretching side A. make 2 inches on either side of the little piece come over the end for buttons.
Sew together sides B and C, making sure it in inside out. turn right side out and sew buttons and straps on, and you’re done! easy as anything.