Have you tried adjusting via the 'Size' button on the marks card?
yes, but that doesn't work as my measure (and ranges) are based on color. I tried using size, but that just gave me be different font sizes depending on my range. I don't want graduated sizes of the circles, I just want them all to be about 2X what the default is. If there's a way to do it with size, I've not figured it out yet. - Thanks.