Extended these are 11.75\” long. From Wikipedia: A Jacob\’s ladder (also magic tablets, Chinese blocks, and klick-klack toy[1]) is afolktoyconsisting ofblocksof wood held together by strings orribbons.When the ladder is held at one end, blocks appear to cascade down the strings. This effect is avisual illusionwhich is the result of one block after anotherflipping over. It may be considered akinetic illusion, where the blocks appear to change position when they do not.[1]Its name Jacob\’s Ladder comes fromthe biblicalladder to heaven, mentioned in Genesis 28:12.