3 in x 3 in (76 mm x 76 mm). For over 40 years, Post-it Brand has helped your thoughts turn into action. So, no matter how big or small your idea, Post-it Brand can help bring it to life Post-it.com. how2recycle.info. Let's connect (at)postit. Facebook. Instagram. Twitter. Post-it Notes are recyclable. Made in USA with globally sourced materials.