These four, little buttons are only 3/4 inch long by 1/2 inch wide (they vary slightly from one to the next).
Some would call these 'Shabby Chic' - I just think they look like a few pieces of iron pipe that have seen better days with some of the paint chipped off - like those old swing sets of my youth. Yup, they resemble a few little chunks of scrap iron!
They're cut from a textured slab of blended clays (not really agateware - more like 'mushed together ware').
As small as they are, they'd sure look nice on a hand knitted or crocheted scarf or neck warmer - or accenting a felted bag or purse.
Although the buttons are washable, it’s best if you either hand wash the garment or turn it inside out and hang or block it to dry.