As for the shape of kaisaki, a different rule is adopted by each school of tea ceremony, with shapes being roughly divided into the following categories: oval, straight line, a shape like the edge of a Japanese sword, a shape like tokin (a hood), hiramaru (flat round), leaf-shaped, and a bulb.
櫂先にも茶道各流派により形状の決まり事があるが、おおまかに丸形、一文字形、剣先形、兜巾形、平丸形、葉形、宝珠形と分類される。