Teeny tiny Czech glass buttons on original cards, c1920s. Buttons measure about 1/4". I imagine these trimming some gorgeous creation that flappers like Louise Brooks wore.
I love having a large lot of buttons to pick through. This grouping had all kinds of buttons including pictures, storybook, twinkles, pressed pewter, Czech glass, waistcoat, black glass, plain brass, mother of pearl & velvet perfume buttons.
3rd picture from the top is a storybook button with a design known as the "Easter Boat Ride." It depicts 2 birds towing a 1/2 shell boat with 2 figures inside.
Several, like the navy twinkle buttons & those with a strawberry design have worked their way into bracelets, while others have been sold.