having it be reversible is basically enclosing all ur raw seams onto the inner-inside of the garment^_^
for example...an FFX-2 Yuna Gunner pink hoodie.
I sewed two layers together, (right sides of fabric on the *inside*)
Left about 3" along a non-noticable seamline, then fliped it inside out, and thus now the *right* sides of the fabric are on the outside.
And all my raw seamlines are on the inside and fully enclosed.
im not sure if that makes anysense. but okay. i guess if it is terra's dress, it is essentially a tube-dress.
So u put one "tube" inside the other, right sides facing eachother.
then hem the stop of it
then hem the bottom of it, but leave 3-4 inches of space at the bottom-back to enable you to fit ur hand in to flip it inside out after.
then after u flip it inside out, you can do a small "invisible" seam-line to close up the 3-4" gap^_^
then iron it so the top and bottom hems are crisp and sharp. u may want to do an addition seam along the top and bottom to keep them crisp.
i hope that made sense and was of some help X_X im not tht good at explanations sorries