24L Set of Three 1930-40s Teal Blue Square Four-Hole Casein Buttons, 5/8"

A perfectly matched trio of authentic 1930s casein buttons in a dreamy teal blue. Their softly rounded square shape and classic four-hole sew-through design feel both playful and refined—an irresistible finishing touch for a garment that deserves something special.

Era: 1930s-1940s
Quantity: 3
Size: Small
Measure approximately: 24L, 24 lignes, 15.2 mm, and 19/32" (close to 5/8")
Attachment: Four-hole, sew-through
Color: A muted teal blue with a subtle matte or semi-matte finish typical of aged casein material

Material: Casein. Invented in 1897, Casein milk plastics are a type of plastic made from a protein called casein found in milk. Also known as Galalith in Europe, it was one of the first synthetic materials used for buttons after celluloid. The production of casein plastics all but ended after 1945 due to the introduction of newer plastics.

Origin: Europe, most likely Germany

Uses: shirts, blouses, dresses, children's clothing, or light jackets. These buttons are ideal for replacing missing ones on vintage garments, customizing retro-style shirts or blouses, crafting jewelry, or using in mixed-media art and sewing projects. They add an authentic period touch to clothing restoration or upcycling.

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