Eight of each of Egyptian and American cotton cultivars were measured by Fibrograph, HVI and AFIS in the laboratories of the SRRC, ARS, New Orleans, Louisiana, USA. Fibre length measurements; i.e., 2.5 % SL, 50 % SL, UR %, UHML, ML, UI %, UQL, and SFC % proved to be significantly affected by cotton cultivars. Egyptian cotton was of higher fibre length measurements as compared with American cotton, the difference between the means in this respect was 0.29 inch (28.15 %). Within the Egyptian cotton cultivars, the ELS Egyptian cotton cultivar Giza 45 showed the longest fibres (1.41 inch) and Dendera showed the shortest ones (1.22 inch) . Whereas in the American cotton cultivars Stoneville 213 exhibited the longest fibres (1.12 inch) and AMS showed the shortest ones (0.85 inch). Egyptian cotton cultivars were of lower mean of short fibre content whether measured by weight (w) or by number (n) than American ones.