Danelle,
The measurement across the base lobes on the handle side is the same 2 3/4". I suppose the across the handle measurement is close enough as those old potters had to hand apply the handles and the kiln temperatures varied. Then too, I don't have a perfect way of measuring other than a tape measure and my old eyeballs.
Since all of your help is out of pocket, perhaps you may be able to help I.D. a pair of 8" polychrome floral mulberry candlesticks ?
Thank you so much,
Jim