A kit for hair dyeing, i) a first container containing a composition comprising an oxidative dye； and ii) a second container comprising a composition comprising a material that produces peroxide, wherein A side having a length of Xmm, a first end closed by a bottom surface having an outer diameter of Ymm, and a second end facing the first end and having an opening having an inner diameter of Zmm, the ratio of X to Y being less than 1: 1 A kit for hair dyeing comprising a second container, wherein the inner diameter Zmm differs from the outer diameter Ymm by 15% or less and the inner diameter Zmm is 60 to 80 mm. [Selection] Figure 1染毛用のキットであって、ｉ）酸化染料を含む組成物が入った第一の容器；およびｉｉ）過酸化物を生じる材料を含む組成物が入った第二の容器であって、高さＸｍｍの側面、外径Ｙｍｍの底面で閉鎖された第一端、および前記第一端に対向し、内径Ｚｍｍの開口を有する第二端を含み、ＸのＹに対する比が１：１未満であり、前記内径Ｚｍｍは、前記外径Ｙｍｍと１５％以下異なり、かつ前記内径Ｚｍｍは６０から８０ｍｍである、第二の容器を含む、染毛用のキット。【選択図】図１
