KINGSO 6X Teacher Stamper Self Inking Rubber Stamp Set Praise Reward Stamps Motivation Sticker School Material: Outer is plastic Size:APP 2.5cm x2.5cm x2.3cm/1"x1"x0.9" Don't need another with inkpad,long service life A group of six colors, six kinds of patterns Encourage language include: well done,great,super,very good,nice work,terrific