An illustration shows the unfolded version of a rectangular prism composed of 6 rectangles. There are four adjoining rectangles positioned horizontally. The first and third are similar and smaller. The second and fourth are similar and bigger. The first rectangle is labeled 1 millimeter on the top horizontally. The fourth rectangle is labeled as 5 millimeters on the bottom and 4.5 millimeters on the right side. The second rectangle shares the top and bottom sides with two similar rectangles, one on each side.

The second rectangle is labeled as 3 millimeters on the left side and 4 millimeters on the right side. The top and bottom sides of the second rectangle are labeled as 1.5 millimeters each. The fifth rectangle is positioned vertically next to the second rectangle. It is labeled as 4 millimeters on the left side and 6 millimeters on the right side. The top side is labeled as 1.5 millimeters and the bottom side is labeled as 1 millimeter. The sixth rectangle is positioned vertically next to the fourth rectangle. It is labeled as 5 millimeters on the left side and 4.5 millimeters on the right side. The top side is labeled as 1 millimeter and the bottom side is labeled as 6 millimeters. The illustration shows how the rectangular prism can be folded from these 6 rectangles.