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In page Electric upright bass:

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The scale length of EUBs varies: some scales are 42", similar to most double basses, whilst other models have scale lengths of only 30" like a short scale bass guitar. The shorter scale can make it easier for bass guitarists to convert to the EUB. Some scales lie between these two extremes, for example 34", like a long scale bass guitar. The fingerboard extends over two octaves and usually has side dots for the players reference. Regardless of scale length, the strings are usually tuned to E1, A1, D2, G2 (see Scientific pitch notation) at the same pitch as the double bass or bass guitar.