We have 3 sets of vintage buttons. From the top left they are as follows:
8 Brown Buttons Superior Quality Vintage lot. Most of them are still on the original card with 2 loose. They measure about 1/2" across the center with a back shank. They are plastic in new condition.
Top right side: 5 vintage buttons which are a gray color with a back shank to sew the button on. They measure about 1" across and are plastic. I believe they are from around the 1950's - 1960's or so. They are in nice condition although I do have to mention 2 are not quite as shiny as the other 3.
Bottom: 13 vintage buttons which are red with a back shank. They measure about 1 1/8" across and are plastic. I believe they are from around the 1950's - 1960's or so. They are in nice condition. As noted in the photo 1 side of the button is a bit deeper red than the other, they are all this way so I think this is how they were manufactured.