2 – Put the top on and mark the position of your waist, a pin is ideal to do this.
3 – Lay the top down and decide where you want the loops to go. This will depend on the fit you want to achieve but I like them to go just a little above the waist and about twice as far below the waist. You can always add or remove loops later if you want to change the fit. I’m using a 5 cm distance between loops here so place one 2.5 cm above the waist pin and another 5 cm above that, then one 2.5 cm below the waist and 2 more 5 cms apart below that. Mark the positions with pins.
4 – fold the top in half matching the seams under the arms.
5 – insert pins on opposite seam in same position.
6 – Sew the loops on to the back of the t-shirt ensuring the d-ring is pointing towards the center back of the top. If you sew them to the front of the t-shirt or facing outwards over the seam an unsightly fold will be created when the lacing is put through. Ensure stitches go all around the curve to keep the d-rings straight. If using split or blind rings sew around about half the ring on the side closest to the seam so the unsewn side points towards the center back. I’ve used green thread here so it shows up against the ring but normally I’d have used a thread that more closely matched the colour of the ring or put in enough stitches to completely cover the metal.