These bowls are cut from the same pattern using an Aspen board and a Red Oak board, then swapping the top ring during the glue-up. They are 7" wide at the top with a 20 degree taper. The rings are 1/4" wide. I plan to bill these as "Friendship Bowls" that are made in pairs. Buy two, then give one to a friend. Kind of a gimmick, but what the heck.
The spindle sander really helps with clean-up since the two woods sand very differently.