Channel set diamonds create a smooth array of diamonds, touching edge to edge in a channel of gold or platinum. Channel settings require perfectly matching sized diamonds and in especially in the case of baguette
and princess cut diamonds, the cut of the diamond should also be matched so that the facets of all the stones are nicely aligned.
Resizing a channel-set ring is a significant challenge, particularly if the diamonds are set all the way round. In many cases, making a new ring would be required if the size change is more than minimal.