Hi Ann,
The high set Chloe range are designed to sit next to wedding / eternity bands. We also sell a low set which is not such a great fit!
As long as you order the ring in a size between a J - Q you are at liberty to return it for a full refund if you are unhappy with the fit.
The diamond itself is also worth a quick mention, this diamond is about size...it's a very large diamond for the money. It will have a great colour and sparkle but if you look closely you may be able to some small inclusions (marks) in the diamond itelf.Read More Here About Diamond Quality.
Buying a diamond is a balance between size, quality and of course price... I have written a bit more about it here...Choosing a diamond.
I hope that this helps but let me know if you have any other questions.