Kiprim Laser Tape Measure, $11 (was $22) at Amazon. Source: Courtesy of Amazon. ... “Fantastic to use for inside measurements — saves time measuring from center point to both corners.

Not all tape measure brands are ... you can wash and reuse the tape over and over. The Center-Finder is also neat in that it ... it'll also be marked as 7.5 inches since that's the halfway point.