I can't find the dimensions for the snap, it's manufactured by weaver leather. But, it is also sold by a weaver reseller that I have worked with in the past and they are quite nice so I'm going to email them. Worst case is I buy one and measure it-which I actually am going to buy one if not for the request than to try out for myself. So if they don't give me the dimensions via email, figure I'll have them in a week or so.
I haven't made my store active yet, so I can't give the address yet. The June sale I'm running is going to be the "Grand Opening." It's all set up I just need to list something for sale to make it active, so these orders will be the activating sales.