From my downsizing Doll Dr. Inventory:
This listing is for a Doll shoulder plate connector. See photos. New in package I have MANY sizes, multiples of some. The size for these is around 3/4"diameter approx of the wood button which should be a bit under 20mm, I measured with a caliper to get accurate sizing, so make sure they work with the opening and parts you are connecting, like head of doll etc.I have TWO in this size.
Contains wood button with spring and a cotter pin. My calipers show 19.4mm diameter of the wood button.
One left in this size, I also have two that are 30 mm and a 25MM as well as one that is just under 40mm diameter.
I have some Kemper doll connectors as well, check my store for those. Not branded, these have stickers made in Tawain and bagged but no maker name. Many sizes!
Ships from my smoke free home, thanks for shopping!