[RedHawk47]

Originally Posted by detours

I went to install my risers and realized that although the upper part is the correct size for our bars, the lower part is sized for a smaller bar. You can still clamp it down, but it doesn't come with spacers, so there's a gap.

To those more knowledgeable to me, is it all right to have that gap?

Sounds like you got a set for a bike that came with 7/8" bars that you are upgrading to 1-1/8" bars. I'd send them back for exchange.
They will probably work fine, but the correct ones will the better.