I don’t have nay pictures of this but it was very simple! I had an old t-shirt with an open back already and never really wore it.
I took some left over lace from when I made my Lace Heels and cut out a rough estimate of the whole in the shirt (leaving lots of extra on all ends just to be safe)
I turned the shirt inside out and pinned it the lace around the area, sewed it and cut off the extras!
If you don’t have a shirt already with a hole in it, try cutting your own and replacing it with lace, I’m thinking of doing this with a thirft dress shortly, as soon as I make it to the store and find an good deal! 🙂 If you end up trying this email me at firstname.lastname@example.org so we can share it with everyone else.