Hairiness is considered as the sum of fibre ends and loops standing out from the main compact yarn body. Beside other instruments, there are two major testing equipments available on the market used for evaluating the yarn hairiness. The most popular instrument is the Uster hairiness system, which characterizes the hairiness by H value, and is defined as the total length of all hairs within one centimeter of yarn. The hairiness H is an average value and giving no indication of the distribution of the length of hairs. Main aim of this contribution is to analyse the yarn hairiness distribution for compact yarns according to the possibility of fitting bimodal function; i.e. dividing the hairiness to two types of hairiness. The individual values of yarn hairiness were extracted fro Uster tester 4. The results show that in general the fibre hair distribution has a bi-modal shape and comprises a mixture two Gaussian distribution. Three cotton compact yarns of count Ne. 14, 20 and 30 were produced on three different compact spinning machines were used for verification the results.