Choose ONE size, #4(3.2mm), #5(3.4mm), #6(3.6mm), #7(3.8mm), #8(4.0mm) to be the large end and ONE size #1(2.6mm), #0(2.4mm), #00(2.2mm), #000(2.0mm), #0000(1.8mm), #00000(1.6mm), to be the small end. If you need more than ONE key, NO PROBLEM, just let me know what sizes and I can combine shipping and invoice you for the extra keys needed, if you need more than what's listed as available in the listing.                                                                                                                                                                  Since this is a custom order item, returns are not allowed.HOWEVER, I am willing to work with reasonable customers to see that they get a key that works. So PLEASE contact me with any issues BEFORE getting excited.  See condition description as well. I am a certified clock repairman with Howard Miller and Ridgeway. If you need more details or pictures, please ask I will be happy to help. I can supply most parts and Movements for Hermle, Kieninger, Urgos, Regula and Hubert Herr 

Note: I can rebuild YOUR movement for you also, please contact me for details or see my other items for sale where its listed.