Genuine Bernina cutwork stitch plate. I purchased this as part of a lot of Bernina accessories and it appears this works with a new 800 series machine but cannot guarantee it will work with your machine. Other listings suggest that this cutwork plate works with 820, 830 and 880 models. 

Please note that this plate only has one hole on the bottom right and please note the shape of the center design with the two rounded bump out areas near the center needle holes. Other plates have more holes around the edges.

It is 2 9/16 inches wide and 1 15/16 inches high.