This gorgeous supper set section measures 13" from the long points at the base, and 3" at the top. It is 7-1/2" measured from the center of the top to the center of the bottom. The blue & white printed pattern is Forest-Landscape II. The piece dates c 1800.
It is in excellent condition, with no chips, no cracks, and no repairs. It rings when tapped (as well as earthenware ever rings). It carries the blue painted Spode workman's mark of a tiny "H". Robert Copeland identifies this as a Spode mark in page 167 of this book, "Spode's Willow Pattern and other designs after the Chinese".
I have seen supper segments used to great effect in wall displays of blue and white plates. They break the monotony of all those round shapes!
Please note that I have a 2nd, larger, part of this supper set available in my shop.