I seen a review on this item on Utube. A lot of your sewing is done in cm and I only know inches. This tape measure breaks it all down in 10 cm with each 10 cm a different color. Then you flip the tape over and it's shown in inches. How neat is that. Problem solved. I don't have to Google now many 10 cm equal an inch. I now know it's 4 inches. Love it. Everyone needs this.