Thank you
@nat74 for the feedback!
My SA agrees as well. Was SO excited to finally bust these babies out the next day!
Tip: Learned Extra sandals have the exact same rubber sole (I checked with my 37 Chypre). If Chypres aren't available in store, try Extra sizes to test the length.
I tried 37.5 Extras and all of my toes didn't touch the ridge, but it was loose. SA said Chypre will stretch a little, so 37.5 will probably be too loose. Also, she said my heel/toes are still not quite touching the inner ridge, so 37 it is!
I watched all the YT videos I could find, and those with narrow feet in a similar situation say the 1/2 size up makes them grip their toes/too loose & end up preferring their TTS.
Hope this helps others as well.