For $40 - half the price of other color-accurate swatchbooks - you'll receive 40 very big color cards.
Each individual color is four inches by eight inches - or larger! Vastly larger than the 1 square inch of color you find in most swatchbooks.
The huge size lets you experience the full effect of each color in your own mirror, without having to buy a single shirt.
These enormous swatches definitely aren't for your back pocket. Keep them in a binder or folder.