Remember back in the day when your mom would measure and mark your growth against a wall or tall piece of furniture? For awhile there I thought I was bound to be an NBA star...until I stopped growing (in the right direction) sometime during my 16th year and decided to focus on the arts instead of basketball.
With that memory in mind, I'm kind of liking this Measurement Shelf, a tall bookshelf with a sliding and integrated measuring stick from Boom Design. But at this point, I'd have to have kids or wait around to start shrinking due to age to use this thing. Sometimes ignorance is bliss.