Class 5 DOT Hazard labels are used for items that are oxidizers or organic peroxide. These vibrant yellow labels with black printing stand out so that your packages will be shipped and handled properly. Class 5 hazard labels measure 4" x 4", and when you purchase 5 rolls or more, you will receive a discount per roll! Purchase your DOT Class 5 hazard transport labels from The Label Supplies Shop and save.