Started playing around with some spare cloth... looks more like tiny masks than anything else, haha.
Top one was a trial that was too loose, middle one was much better after doing some research and I found a site that gave some cuts. (Legs holes 1 1 /2" separated by at least 1 1/2"), bottom one is where I stopped tonight. This one seems to hold pretty well.
Used a pen cap to hold it from collapsing, and used two 'gator' clips to hold it like it would meet on my Bearded Dragons back. The rope would go through the middle forward a tad. Going to attempt that tomorrow and see if there is any slip outs.
If it works well, I'll let you you know, and if it interests you I'll see if I can't share some pattern measurements.
Also, I'll see if I can't get a picture with my Bearded Dragon wearing it.