These glass buttons have a shimmery cream surface that catches the light beautifully.(But is probably not very stable in a washing machine !)
They are well moulded and slightly taller than they are wide.
I have them in either 1.5cm or 1cm tall.
There are 24 of them on their original display cards, and I have a couple of cards in the 1.5cm size with 21 not 24 buttons.