There’s plenty of ready to wear examples with the crossover in the front-
but I might prefer the crossover as a design feature in the back.
My approach to this mod is in keeping with Brittney’s, I’m just sort of, shall we say, lazy, so I don’t bother to prep any new pattern pieces.
My current favorite pattern to modify is Chalk & Notch’s Pixie tee.
Cut all the pattern pieces for Pixie’s banded view-
1 front hem band
2 backs (keep mirrored)
2 back hem bands (hem band, lengthened, see * below)
2 sleeves and cuffs
Take your backs, keeping them mirrored (wrong or right sides facing), and create the hem shape using a dress maker’s or French curve (or just your artistic eyeballs!). You can also use a straight line for this, but I prefer a curve. I like to make the curve somewhat dramatic with the high edge being about 6-8 inches from the original hem.
Keep your curve away from the opposite side seam. Otherwise, your front piece will be longer than your back pieces.
*Measure the length of your newly created hem. It’s longer now that it’s cut along a slope. Your back hem bands need to be at least as long as your measurement. Add a couple extra inches to be safe. They will get trimmed later.
Attach the hem bands to the front and both backs individually without stretching the back bands. Again, we’ve added a curve to the hem of the back pieces, it is longer/wider than the original hem. The bands will sit flatter and look nicer when not stretched.
After attaching the back bands, square or true them, using a straight edge inline with the side seam, removing any excess length.
Layer one hemmed back piece over the other. I tend to prefer the left side crossing over the top of the right. You can baste (or lazily pin only) the shoulders, armscyes, and side seams together if you like. Treat this as a single piece when sewing the shoulder seams, setting the sleeves, and banding the neckline.
The assembly otherwise follows the original construction order.
Do take care when closing the side seams to align the bands.
You can top stitch as desired.
Now you’ve got a wonderful, business in the front, party in the back Pixie.