This is a lovely butter pat measuring 2 7/8" in diameter. The 10 sides are straight. The border is printed with a design of three leaf clovers set in typical Art Nouveau swirls. There are no marks, but the butter pat was made circa 1910 by W. H. Grindley. The pattern is IDRIS. I have 2 of these available. Both are in excellent condition. The price is for a single. You may purchase 1 or both.