Hi! The official answer is no, but I think it is really a "it depends."
VCA officially will not resize a BTF ring, but what they can do is add sizing beads. I've had sizing beads before on a Tiffany ring, and I cannot stand sizing beads. I find them uncomfortable, and equally as important, I find them super ugly. It permanently destroys the beauty and aesthetic of a beautful piece of jewelry. That's just me ofcourse.
Hence, I had the beads removed and decided to resize the Tiffany ring.
Long story short on resizing, I needed a size 6 1/4 in that particular ring as it was very top heavy. I like to keep things pure, therfore, I don't like off-sizes which is why I wanted to keep my Tiffany ring at a standard ring size of 6 1/2. That's why I initially did not want it resized down a quarter-size. However, when I saw how the beads felt and looked after they added them, I had Tiffany remove the beads and resize it to a 6 1/4.
On VCA BTF rings, VCA will add sizing beads, but my guess is if you are super VVVVIP, they will resize for you. Why this assumption?
I told my SA no ugly sizing beads, and my SA went to bat for me to get it resized. It was approved by VCA North America (I live on the US East Coast), but it got shot down by VCA CHQ. I am a regular client, but not a VVVVIP. The fact that they even went to bat for me vs. an initial flat out "no" response implies to me it's possible. It's just not possible for me.
After waiting months for a response from VCA, I was so bummed the final answer was no.
Then... I thought about buying a new BTF ring in a smaller size.
Then... I thought what if my fingers go back to their bigger size. I will always be chasing this problem.
Then... I smacked myself on the head and said to myself "quit being a whiner expecting perfection and deal with it".


So... I went bonkers and bought tons of ring sizers and decided on the ring sizer I posted earlier. Shocking, but I actually love these ring sizers. They are working out great and can easily be removed.
One last thought (sorry for the long post, I will zip it after this...)
As FYI, if you are considering the Lotus ring, while it is marketed as a BTF ring, it's not truly an open ring. The Lotus ring is a closed ring. My Lotus ring is very loose on me, also by choice as I like my rings to fit loose. However, due to the complicated design of the Lotus ring, it's nearly impossible for that ring to fall off. Just FYI in case you are considering the Lotus ring.
Okay... zipping it...
I do hope you try on BTF rings. I love rings; it is my priority category when it comes to jewelry pieces. Rings add such a glamorous statement to any outfit. Good luck!