There are 2 sheets of coloured carbon paper in each pack, in the blue pack there is a blue sheet & a Red sheet, ideal for marking on light coloured fabrics.
The Yellow pack has 1 sheet of yellow & 1 sheet of white, ideal for marking dark fabrics.
Please choose which pack is best suitable for your needs, or both since we all use both light & dark fabrics! Don't forget to use a Tracing Wheel H285 with this product. Another staple in the sewing box.