These colour swatches are 100% human hair. Hair swatches are an excellent tool for learning about hair colour and analysing the results of various colour formulas, taking traditional colour theory to the next level. They help you understand areas of hair colouring that you have less experience in. When you can see the effect various colour formulas have on swatches it will give you complete confidence when you have to replicate the colour in the salon. The measurement is 14 cm length and 1.3 cm width.