Easy to use-Detail stands out very nice. Show Your Approval - parent signatureTeacher Self Inking Rubber Stamp Photosensitive Stamps Ink -the one you got is photosensitive stample.It is without ink but the oil can come out automatically, easily marking papers. stamp features a matching cap to keep the ink fresh. Wide application-Great for party favor, teacher's classrooms, birthday party, classroom prizes, carnival, stationery, greeting cards, scrapbooks Design,Giveaway, Holiday Gift, and all other uses These Teacher Stamps Are Great Educational Tools To Stretch The Creative Imagination Of Your Student.These Pre Inked Christmas Stamps Are The Best! Stamps Have Never Been Cooler! Good quality-non Toxic and Safe ,approx 0.5 inch in diameter