This is a group of 16 flat back blue and turquoise striped square shape glass  buttons. There is no shank. Look at the photos. At some point some of the pieces had something glued at the back.  The square buttons are 1/2" x 1/2". (Please see my photo with a ruler.) These were made in Czechoslovakia. I am selling these as is. These are old, never used and have been packed away in boxes for many years. 

I've never seen others that look like this. These pieces are really interesting. They'd be a great component for jewelry making.

I have used these vintage buttons as components for making jewelry. I have many more than I can possibly use. This is why I'm now offering some on Ebay. When I obtained these buttons from a reputable dealer, I was told they were from the 40s and 50s. I am not an expert on buttons, so I cannot guarantee that.