Imagine the were sold individually haha. These are a typical length for Japanese chopsticks. They start square at the top and taper down to a fine octagonal tip. I also finish them in a beeswax finish to lower your risk of death while using them.
Size in millimeters
220 long, 8 x 8 at the top, tapers down to 3 x 3 at the tip
Species
Kiaat, Oak, Ash