uxcell Steel School Message Bulletin Board Thumb Tacks 19mm x 23mm 50 Pcs Copper Tone Size(Each): 19 x 23mm/ 0.75 x 0.9 inches(D*H) Using for home, office, school to nail paper, files, documents on the paper wall. Perfect choice for hanging memos and pictures. Thumb tacks features smooth, steel heads and sharp steel points, please watch out to use. A perfect item for your life, convenient to your daily life.