There are many options, here are some of them:
- you can sculpt by rolling out a thin pancake from sculptural material, marking it into identical squares with a knife, manually roll balls from each square, or you can roll up a thin sausage, cut off equal parts from which to roll balls, gluing them to the figure (for flat buttons it is enough to press the ball harder);
- you can be made from microbeads - these are glass balls 0.7-0.9 mm in size, maybe there are smaller ones (suitable only for spherical and hemispherical buttons);
- Solder for soldering in stores is sold in the form of small balls from 0.2 to 0.5 mm, but it is possible that there are other sizes (only suitable for spherical and hemispherical buttons, although solder balls can be flattened, thereby obtaining flat buttons);
- you can stamp buttons from thin foil using a cut and sharpened medical needle (only suitable for flat buttons);
- can be sculpted using a special jewelry tool.