Rachel
Size R (to be confirmed with 3D printed sizing rings)
Around 2.5mm wide
Profile- slightly more domed than gold example you saw
Metal edged, internal inlay ring
Honister slate
Thickness - 2mm
Rhodium plated
18ct White Gold - £1493
John
Size R 1/2 (to be confirmed with 3D printed sizing rings) 
5mm wide
Profile - Slightly curved edges 
Metal edged, internal inlay ring
Honister slate 
Thickness - 2mm
Rhodium plated
18ct White Gold - £1811
£100 discount from total order 
= £3204
ETA - delivery in August
The costs include all labour, materials, hallmarking, delivery and the sizing rings.
Please note that custom orders are made to your exact specifications and are not eligible for refund.
In the very unlikely event you are not happy with your ring when you receive it please let us know as soon as possible and we will do everything we can to put it right.