Anime mecha subjects such as Gundam are most often portrayed as being between 15 and 20 meters tall, so the kits are scaled in a manner that brings the subject to an economical and manageable size. For machines in this size range, scales of 1:100 and 1:144 are most common, with 1:60 being reserved for larger (and usually more expensive or elaborate) kits. For smaller subjects, scales such as 1:20, 1:35, and 1:72 are also common. Bandai kits will commonly use a fairly extensive redesign, rather than the original design itself. Some of this inconsistency in representation may be due to the inherent difficulties in turning a 2-D cel-animated design into a 3-D design. Additionally, newer versions of the same model could be very different from an older version, due to better manufacturing technologies.