Larger and firmer than traditional painting knives, the Bob Ross palette knives work like magic. This straight-edged blades are ideal working with the Ross painting method. This painting knife makes picking up paint easy and simple. This knife is excellent for areas that are difficult to paint with the standard size knife. Details:No. 5Measures slightly more than 8" (20.32 cm) overallBlade is approximately 3.75" (9.5 cm) longFor use with oil