Koogel Box Molds set is fun to play around~ This set contains one round, one square one hexagon resin mold boxes and a pack of 12 colors of flash powder. Each individual mold is about 3 inches in size. each one comes with a cover to make it into a complete box. These are made of silicone and they are very easy to work with. Easy to clean after use too. These are great for DIY projects to create boxes to hold earrings, coins, rings, etc. The 12 flash powder are packed individually for ease of use. Great way to spend time with kids to be creative~