These are very small oil paintings, most just few inches in either dimension.
Because of their extremely small size, they are not reproduced large here, but still probably appear larger on your screen than they are in life.
You can see their relative scale in this picture of them on a folding table.
Some – the ones not captioned as being in collections – may be available for sale.
To inquire about available tiny paintings, email firstname.lastname@example.org to be sent a page with currently available tiny oil paintings.