Are there different size bows for cellos?

Yes, there are different size bows for cellos. The standard cello bow is 73 cm, but shorter bows are also available. These tend to be used by children or people with smaller hands. Shorter bows are 71 cm or 70 cm. For example, the cello bows come in full, 7⁄8, 3⁄4, 1⁄2, 1⁄4 and 1⁄8 sizes that correspond to the sizes of cellos.