Use these Colorful Thumbtacks to post notes, postcards, reminders and more! Great for home or office. There are 100 thumbtacks in a variety of colors per box including blue, red, yellow and green. Thumbtacks are made out of metal with a color coated top. Set comes packaged in a snap-close plastic holder measuring 2.75" x .75" x 3.75". Box has a convenient hanging hole for display.