Jonathan Adler Fleet Week Cocktail Drinking Coasters Set of 4 Appetizers Anchor Rope Boating Beach Lake Porcelain Nautical Red White Blue New in the box/ never used They are not completely flat, a little concave edge and stack nicely. The size is about 4” in diameter which can also be perfect for casual appetizers or to rest a fork. In the last two photos of the rope coaster, I do point out a tiny spot from the manufacturer…it’s not a chip. You probably wouldn’t have noticed if not pointed out.