new, high qualityFoam ball measurement: this set of foam balls are in 4 diameters, satisfy your different needsMade of solid foam of high density, not easy to break and scatter, very lightweight, allow you to use for a long timeConvenient to use: you can use this set of decorating balls with glue to stick them on some items, or use a needle to pierce them together to make a string, depend on your needsGreat for crafting projects or various decoration in different situations, such as Christmas, Wedding, Party, arts, household and school projectsSpecification:Material: FoamSize: Approx. 10mm / 0.39inch ;15mm / 0.59inch ;20mm / 0.79inchColor: WhitePackage Includes:100 Pieces 10mm Foam Balls100 Pieces 15mm Foam Balls100 Pieces 20mm Foam BallsNote:Item measure by hand,it could be 1-5mm difference,your kind understanding will be much appreciated!