I have pretty small wrists, but I have always been intrigued by the Ultra and am considering trying it. The thing is, I have pretty slender wrists. I have an AW8 45mm. It seems ok, size wise. I tried the 41mm before settling on 45mm and quickly returned it because of it was just too small. I’m curious how small a wrist can be while still using the Ultra.
This is how my wrist at 5.8-5.9 inches circumference fits the Apple Watch Ultra. I primarily wear a 40mm gold Stainless Steel Apple Watch Series 6, with a s/m sport band at the third hole. The Ultra Trail loop I had to go all the way through the first hole.
Here is the Apple Watch Ultra I tried on at an Apple Store with Ocean Loop~