Incubator length - body length?

[OutandBack]

At 69", I am tempted to try the short if I ever get a 0° Incubator. But my other standard length Incubators work so well I'll probably just stick with that to be safe.

That probably is a good decision. There's a trick to the leg shelf fit.
You can never allow your butt to ride up on the leg shelf or you will have a big air gap at you back.
If a standard fits you I'd stay with that length when upgrading to a warmer under quilt

[cinnamon]

removed so not to hijack thread