BOUGIE stuffI Just to bookmark this for myself since this asks often

If you haven't seen this, I found this on OH, and think it'll give you an idea of honestly how minimal difference in a 32 and 40 really is.

Just a visual to offer more pictures of how minimal the difference is between the sizes your concerned about.

Here is a fabulous link for bougies. It physically lists every size of bougies, with the millimeter measurements.

Scroll to pages 3 and 5 to see the table of reference for bougie sizes.

http://www.medovations.com/pdf/Esoph...Dilatation.pdf