The geometrically nitpicky will call this a half-cylinder, but regardless of name it’s a great tool for stretching your calves, supporting your head, bolstering your knees, and much more. Made of lightweight closed-cell foam, it’ll become your best friend. Get one for every room in your house!
12" long x 6" wide x 3" tall.
(If the half dome were a full cylinder, it would have a 6″ diameter.)