Sunshine Serafina Round Head Wood Push Pins or Thumb Tacks Decorative Round Novelty Style Map Tacks (50PCS) Made of woodHead Diameter is about 0.39 Works on cork board, bulletin board or drywalleasily hang papers, posters, photos, memos, maps and more. Easy to spot on the board and big enough to grab without being huge. Unfinished natural wood can be painted or left natural. Can be easily painted to match any custom colors, good for thumb tack crafts.