Buy the crochet pattern here:
How to make a backless crochet bodycon dress:
Hook: 6 mm
Yarn: Bouclé, size 3, 50 g = 90 m. I used the brand Hjerte Twist
I used 6 yarn balls (300 g) for my dress. I am 88 cm in bust, 104 in hip, 168 cm tall (size M-L).
Follow the instructions from Carrie dress. When you reach the back make double the amount of decreases, so you start and end the row by skipping the stitch. When the row is small enough to fit from one side of your breast to the other you stop. Make more rows without decreases if needed, otherwise move to the straps.
Make a chainless foundation by inserting your hook in the next stitch/side of the dress, yarn over, pull through, yarn over, pull through 1 loop, yarn over, pull through both loops. Stop when you have approx. 100 stitches or enough so that the strap can be weaved once through the side of the dress. Break off the yarn and do the same on the other side o the dress.
Approx. 1/3 down the top, insert the strap and then tie it on the back.