This listing is for new NOT genuine Omega watch hands. The length of each is measured from the mounting hole to the tip and shown in the selection box.  The second hands are for a 0.18 pinion, the hour and minute hands are 0.80/1.50mm.  Please verify that these will fit your movements.  The second hands are for calibres 350, 351, 353, 354, 355, 360, 361, 370, 371, 372, 470, 471, 480, 483, 484, 485, 490, 491, 500, 501, 502, 503, 504, 505, 510, 511, 520, 540, 550, 551, 552, 560, 561, 562, 563, 564, 565, 570, 571, 580, 590, 591, 592, 593, 600, 601, 602, 610, 613, 750, 752 or any other movement with a 0.18mm sweep second pinion. The hour/minute hands are for calibres 500, 501, 502, 503, 504, 505, 510, 511, 520, 540, 550, 551, 552, 560, 561, 562, 563, 564, 565, 570, 571, 580, 590, 591, 592, 593, 600, 601, 602, 610, 613, 750, 752 or any other movement with a 0.8/1.50mm hole requirement.  Note that each purchase is for one set of whatever you have selected, either one pair of hands - hour and minute, or one second hand.  Again, these are NOT made by Omega.