Assorted standard sized (2-1/4-inch) pinback buttons as shown for a total of 176 buttons. Normally, the campaign packs are the thing we can ship at extremely short notice, because we try to keep several of each already packed up and ready to just grab and head for the post office! (Unfortunately, this also means we can't substitute designs within a campaign pack, because we'd have to unpack the whole thing, sort through all of the buttons to remove the ones you want us to replace, add the replacements, and then pack the whole thing back up, all of which takes time we could instead spend making more buttons! (But of course you CAN always order a campaign pack plus additional buttons of individual designs -- or just order the designs you want.)
Campaign Pack Assortment #6
...on the button's "curl" (either upper or lower edge, just outside the face of the button that's visible when it's viewed from the front). In 2016, for purposes of selling buttons at Dem-Party-sponsored events, this was usually* considered an acceptable alternative to having a union "bug" on the button. Hopefully this will continue to be the case in 2019 and 2020 (although as devoted as the Dems are to suppressing/silencing us Bernie folks, who can say??!).
* Of course, in the final analysis it depended on the personality of the event organizer. But most of them eventually concluded that, in the absence of a volunteers' union (LOL), they'd concede the validity of LABOR DONATED as an option.