Why would I write about this? Well, because I want to give you some tips, but even more than that, I want to give you some options.
Now, I experimented with different kinds of hardware for the straps. You can certainly use other kinds, like the ones that latch and un-latch. But, I made myself a back pack and used "D" rings and they are strong and secure AND are much cheaper and, in my opinion, nicer looking.
This is how I figured that. 2 times 1 1/4" equals 2 1/2" (this allows for the fabric to be folded). Then I added in 3/4" for a 3/8" fold on both sides (for the small pressed fold along the side where the two cut edges meet) which adds up to 3 1/4".
And I don't need to worry about my fingers become part of what I'm sewing.
More tips tomorrow.