Need help with Custom Radiant Halo!!

[Curley]

I am in the process of designing a custom engagement ring and am just looking for opinions on pointer size and width of halo and shank!!
She wants a really delicate halo ring , one without the chunky look but obviously not so thin that integrity is poor.
Here is pictures of what I have so far and I think it looks good but it's hard to picture the final product. Center stone is a 7.03mmx5.12mm rectangular radiant.

 

[Austina]

With the surrounding diamonds being 1.2mm it'll give a delicate halo and look really pretty, I know I'd be thrilled with that ring.

 

[Curley]

Here is another picture from the side profile,
The center diamond is 1 carat, and I don't want the halo to overshadow and be too bulk around the 1 carat diamond.
As well I'm looking for opinions on pointer size in the halo vs the shank, I think slightly bigger will look best but I don't want it to be too much bigger that you can see much of a difference.

 

[Austina]

Just my opinion of course, but I don't think 1.4mm diamonds in the shank against the 1.2mm diamonds in the halo are going to look significantly larger and swamp the ring.

 

[Curley]

Thanks for your reply! Just want them to look virtually the same size from the top and not lose sparkle by being too small as well!