Both about 7/8" they are like large button studs I'm pretty certain they are cufflinks. Gold tone gold filled? One has a quartz like stone very nice a little damage to one of the stones, the other looks like an opaque amber with fern like vegetation on there or they could be artificial they are very interesting looking! Definitely older 1910- 1930. I think you'll like them.                                                                                     

                 

                                                                               

                                   

                                                    

Happy to combine shipping and you will get a good deal, if you buy a few items using 'buy it now' add the items to your cart first and request a new total reflecting combined shipping. Checking out with multiple items as you go to pay there is a link on that page requesting a new total, I usually get to it very quickly. Please look at my feedback - read some of the comments- I have a stellar reputation. No returns.